./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/locks/test_locks_13.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_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/locks/test_locks_13.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/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 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 17:19:05,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:19:05,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:19:05,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:19:05,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:19:05,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:19:05,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:19:05,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:19:05,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:19:05,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:19:05,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:19:05,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:19:05,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:19:05,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:19:05,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:19:05,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:19:05,654 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:19:05,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:19:05,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:19:05,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:19:05,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:19:05,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:19:05,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:19:05,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:19:05,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:19:05,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:19:05,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:19:05,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:19:05,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:19:05,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:19:05,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:19:05,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:19:05,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:19:05,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:19:05,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:19:05,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:19:05,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:19:05,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:19:05,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:19:05,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:19:05,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:19:05,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 17:19:05,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:19:05,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:19:05,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:19:05,703 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:19:05,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:19:05,703 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:19:05,703 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:19:05,703 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:19:05,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:19:05,704 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:19:05,704 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:19:05,704 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:19:05,704 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:19:05,704 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:19:05,705 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:19:05,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:19:05,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:19:05,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:19:05,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:19:05,706 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:19:05,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:19:05,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:19:05,707 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:19:05,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:19:05,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:19:05,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:19:05,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:19:05,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:19:05,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:19:05,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:19:05,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:19:05,709 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:19:05,709 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:19:05,709 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_eaa4df28-361e-458c-ae02-5bffe20a3121/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 [2020-12-09 17:19:05,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:19:05,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:19:05,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:19:05,915 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:19:05,916 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:19:05,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_13.c [2020-12-09 17:19:05,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/data/dca9ee684/b0ca5371dd7a451caa5aeb7e7942b895/FLAG2a2151939 [2020-12-09 17:19:06,312 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:19:06,313 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/sv-benchmarks/c/locks/test_locks_13.c [2020-12-09 17:19:06,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/data/dca9ee684/b0ca5371dd7a451caa5aeb7e7942b895/FLAG2a2151939 [2020-12-09 17:19:06,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/data/dca9ee684/b0ca5371dd7a451caa5aeb7e7942b895 [2020-12-09 17:19:06,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:19:06,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:19:06,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:19:06,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:19:06,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:19:06,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4898ec46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06, skipping insertion in model container [2020-12-09 17:19:06,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:19:06,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:19:06,890 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_eaa4df28-361e-458c-ae02-5bffe20a3121/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2020-12-09 17:19:06,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:19:06,899 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:19:06,917 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_eaa4df28-361e-458c-ae02-5bffe20a3121/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2020-12-09 17:19:06,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:19:06,928 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:19:06,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06 WrapperNode [2020-12-09 17:19:06,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:19:06,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:19:06,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:19:06,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:19:06,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:19:06,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:19:06,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:19:06,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:19:06,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... [2020-12-09 17:19:06,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:19:06,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:19:06,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:19:06,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:19:06,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/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 17:19:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:19:07,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:19:07,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:19:07,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:19:07,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:19:07,463 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 17:19:07,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:19:07 BoogieIcfgContainer [2020-12-09 17:19:07,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:19:07,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:19:07,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:19:07,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:19:07,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:19:06" (1/3) ... [2020-12-09 17:19:07,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bda170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:19:07, skipping insertion in model container [2020-12-09 17:19:07,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:19:06" (2/3) ... [2020-12-09 17:19:07,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63bda170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:19:07, skipping insertion in model container [2020-12-09 17:19:07,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:19:07" (3/3) ... [2020-12-09 17:19:07,471 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2020-12-09 17:19:07,480 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:19:07,483 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 17:19:07,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 17:19:07,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:19:07,504 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:19:07,505 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:19:07,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:19:07,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:19:07,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:19:07,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:19:07,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:19:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-09 17:19:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:19:07,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:19:07,519 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,523 INFO L82 PathProgramCache]: Analyzing trace with hash 8615394, now seen corresponding path program 1 times [2020-12-09 17:19:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142546616] [2020-12-09 17:19:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:07,639 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 17:19:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142546616] [2020-12-09 17:19:07,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:07,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:19:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286748798] [2020-12-09 17:19:07,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 17:19:07,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 17:19:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 17:19:07,655 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-12-09 17:19:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:07,667 INFO L93 Difference]: Finished difference Result 35 states and 60 transitions. [2020-12-09 17:19:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 17:19:07,668 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 17:19:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:07,674 INFO L225 Difference]: With dead ends: 35 [2020-12-09 17:19:07,674 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 17:19:07,675 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 17:19:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 17:19:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 17:19:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 17:19:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 59 transitions. [2020-12-09 17:19:07,697 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 59 transitions. Word has length 4 [2020-12-09 17:19:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 59 transitions. [2020-12-09 17:19:07,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 17:19:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 59 transitions. [2020-12-09 17:19:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:19:07,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 17:19:07,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:19:07,698 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,699 INFO L82 PathProgramCache]: Analyzing trace with hash 258934752, now seen corresponding path program 1 times [2020-12-09 17:19:07,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842134496] [2020-12-09 17:19:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:07,740 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 17:19:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842134496] [2020-12-09 17:19:07,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:07,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:19:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146624891] [2020-12-09 17:19:07,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:19:07,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:07,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:19:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:19:07,744 INFO L87 Difference]: Start difference. First operand 34 states and 59 transitions. Second operand 3 states. [2020-12-09 17:19:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:07,749 INFO L93 Difference]: Finished difference Result 33 states and 58 transitions. [2020-12-09 17:19:07,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:19:07,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 17:19:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:07,751 INFO L225 Difference]: With dead ends: 33 [2020-12-09 17:19:07,751 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 17:19:07,751 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 17:19:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 17:19:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 17:19:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2020-12-09 17:19:07,756 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 5 [2020-12-09 17:19:07,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:07,756 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2020-12-09 17:19:07,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:19:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2020-12-09 17:19:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 17:19:07,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 17:19:07,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:19:07,757 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,758 INFO L82 PathProgramCache]: Analyzing trace with hash -555294705, now seen corresponding path program 1 times [2020-12-09 17:19:07,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926404248] [2020-12-09 17:19:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:07,811 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 17:19:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926404248] [2020-12-09 17:19:07,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:07,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:07,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858264893] [2020-12-09 17:19:07,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:07,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:07,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:07,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:07,813 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand 4 states. [2020-12-09 17:19:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:07,836 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2020-12-09 17:19:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:07,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 17:19:07,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:07,838 INFO L225 Difference]: With dead ends: 59 [2020-12-09 17:19:07,838 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 17:19:07,838 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 17:19:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 17:19:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-12-09 17:19:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 55 transitions. [2020-12-09 17:19:07,843 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 55 transitions. Word has length 6 [2020-12-09 17:19:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:07,843 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 55 transitions. [2020-12-09 17:19:07,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 55 transitions. [2020-12-09 17:19:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:19:07,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:07,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:19:07,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash -34054295, now seen corresponding path program 1 times [2020-12-09 17:19:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894337208] [2020-12-09 17:19:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:07,883 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 17:19:07,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894337208] [2020-12-09 17:19:07,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:07,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:07,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792169655] [2020-12-09 17:19:07,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:07,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:07,885 INFO L87 Difference]: Start difference. First operand 31 states and 55 transitions. Second operand 4 states. [2020-12-09 17:19:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:07,910 INFO L93 Difference]: Finished difference Result 57 states and 101 transitions. [2020-12-09 17:19:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:07,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 17:19:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:07,912 INFO L225 Difference]: With dead ends: 57 [2020-12-09 17:19:07,912 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 17:19:07,913 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 17:19:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 17:19:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2020-12-09 17:19:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2020-12-09 17:19:07,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 7 [2020-12-09 17:19:07,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:07,918 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2020-12-09 17:19:07,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2020-12-09 17:19:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:19:07,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:19:07,919 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1055470428, now seen corresponding path program 1 times [2020-12-09 17:19:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346093616] [2020-12-09 17:19:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:07,966 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 17:19:07,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346093616] [2020-12-09 17:19:07,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:07,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067588212] [2020-12-09 17:19:07,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:07,968 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand 4 states. [2020-12-09 17:19:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:07,984 INFO L93 Difference]: Finished difference Result 55 states and 96 transitions. [2020-12-09 17:19:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:07,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 17:19:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:07,985 INFO L225 Difference]: With dead ends: 55 [2020-12-09 17:19:07,985 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 17:19:07,986 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 17:19:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 17:19:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2020-12-09 17:19:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 53 transitions. [2020-12-09 17:19:07,990 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 53 transitions. Word has length 8 [2020-12-09 17:19:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:07,990 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 53 transitions. [2020-12-09 17:19:07,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 53 transitions. [2020-12-09 17:19:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 17:19:07,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:07,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:07,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 17:19:07,992 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:07,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1640368158, now seen corresponding path program 1 times [2020-12-09 17:19:07,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:07,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619596341] [2020-12-09 17:19:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,032 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 17:19:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619596341] [2020-12-09 17:19:08,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651659289] [2020-12-09 17:19:08,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,033 INFO L87 Difference]: Start difference. First operand 31 states and 53 transitions. Second operand 4 states. [2020-12-09 17:19:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,048 INFO L93 Difference]: Finished difference Result 53 states and 91 transitions. [2020-12-09 17:19:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 17:19:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,049 INFO L225 Difference]: With dead ends: 53 [2020-12-09 17:19:08,049 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 17:19:08,050 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 17:19:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 17:19:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2020-12-09 17:19:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 52 transitions. [2020-12-09 17:19:08,053 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 52 transitions. Word has length 9 [2020-12-09 17:19:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,053 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 52 transitions. [2020-12-09 17:19:08,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 52 transitions. [2020-12-09 17:19:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:19:08,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 17:19:08,054 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash -687981255, now seen corresponding path program 1 times [2020-12-09 17:19:08,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618714620] [2020-12-09 17:19:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,081 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 17:19:08,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618714620] [2020-12-09 17:19:08,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312341685] [2020-12-09 17:19:08,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,082 INFO L87 Difference]: Start difference. First operand 31 states and 52 transitions. Second operand 4 states. [2020-12-09 17:19:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,096 INFO L93 Difference]: Finished difference Result 51 states and 86 transitions. [2020-12-09 17:19:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 17:19:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,097 INFO L225 Difference]: With dead ends: 51 [2020-12-09 17:19:08,097 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 17:19:08,097 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 17:19:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 17:19:08,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2020-12-09 17:19:08,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2020-12-09 17:19:08,100 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 10 [2020-12-09 17:19:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,100 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2020-12-09 17:19:08,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2020-12-09 17:19:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:19:08,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 17:19:08,101 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 147631315, now seen corresponding path program 1 times [2020-12-09 17:19:08,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981838427] [2020-12-09 17:19:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,127 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 17:19:08,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981838427] [2020-12-09 17:19:08,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186666576] [2020-12-09 17:19:08,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,129 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2020-12-09 17:19:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,144 INFO L93 Difference]: Finished difference Result 49 states and 81 transitions. [2020-12-09 17:19:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 17:19:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,145 INFO L225 Difference]: With dead ends: 49 [2020-12-09 17:19:08,145 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 17:19:08,145 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 17:19:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 17:19:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-12-09 17:19:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2020-12-09 17:19:08,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 11 [2020-12-09 17:19:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,149 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2020-12-09 17:19:08,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2020-12-09 17:19:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 17:19:08,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 17:19:08,150 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash 281817550, now seen corresponding path program 1 times [2020-12-09 17:19:08,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813291851] [2020-12-09 17:19:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,174 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 17:19:08,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813291851] [2020-12-09 17:19:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258823850] [2020-12-09 17:19:08,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,175 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2020-12-09 17:19:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,188 INFO L93 Difference]: Finished difference Result 47 states and 76 transitions. [2020-12-09 17:19:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 17:19:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,189 INFO L225 Difference]: With dead ends: 47 [2020-12-09 17:19:08,189 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 17:19:08,189 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 17:19:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 17:19:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2020-12-09 17:19:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 49 transitions. [2020-12-09 17:19:08,191 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 49 transitions. Word has length 12 [2020-12-09 17:19:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,191 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 49 transitions. [2020-12-09 17:19:08,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 49 transitions. [2020-12-09 17:19:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:19:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 17:19:08,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,192 INFO L82 PathProgramCache]: Analyzing trace with hash 146623880, now seen corresponding path program 1 times [2020-12-09 17:19:08,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086281480] [2020-12-09 17:19:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,220 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 17:19:08,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086281480] [2020-12-09 17:19:08,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591585288] [2020-12-09 17:19:08,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,222 INFO L87 Difference]: Start difference. First operand 31 states and 49 transitions. Second operand 4 states. [2020-12-09 17:19:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,234 INFO L93 Difference]: Finished difference Result 45 states and 71 transitions. [2020-12-09 17:19:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 17:19:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,235 INFO L225 Difference]: With dead ends: 45 [2020-12-09 17:19:08,235 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 17:19:08,236 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 17:19:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 17:19:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-12-09 17:19:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2020-12-09 17:19:08,238 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 13 [2020-12-09 17:19:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,239 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 48 transitions. [2020-12-09 17:19:08,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2020-12-09 17:19:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:19:08,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 17:19:08,240 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,240 INFO L82 PathProgramCache]: Analyzing trace with hash 250587747, now seen corresponding path program 1 times [2020-12-09 17:19:08,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773399364] [2020-12-09 17:19:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,267 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 17:19:08,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773399364] [2020-12-09 17:19:08,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713973400] [2020-12-09 17:19:08,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,269 INFO L87 Difference]: Start difference. First operand 31 states and 48 transitions. Second operand 4 states. [2020-12-09 17:19:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,282 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2020-12-09 17:19:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 17:19:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,283 INFO L225 Difference]: With dead ends: 43 [2020-12-09 17:19:08,283 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 17:19:08,283 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 17:19:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 17:19:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-12-09 17:19:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2020-12-09 17:19:08,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 14 [2020-12-09 17:19:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,286 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 47 transitions. [2020-12-09 17:19:08,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 47 transitions. [2020-12-09 17:19:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 17:19:08,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 17:19:08,287 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash -821499331, now seen corresponding path program 1 times [2020-12-09 17:19:08,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944255134] [2020-12-09 17:19:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,313 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 17:19:08,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944255134] [2020-12-09 17:19:08,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980178412] [2020-12-09 17:19:08,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,315 INFO L87 Difference]: Start difference. First operand 31 states and 47 transitions. Second operand 4 states. [2020-12-09 17:19:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,328 INFO L93 Difference]: Finished difference Result 41 states and 61 transitions. [2020-12-09 17:19:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 17:19:08,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,329 INFO L225 Difference]: With dead ends: 41 [2020-12-09 17:19:08,329 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 17:19:08,329 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 17:19:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 17:19:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-12-09 17:19:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 46 transitions. [2020-12-09 17:19:08,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 46 transitions. Word has length 15 [2020-12-09 17:19:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,332 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 46 transitions. [2020-12-09 17:19:08,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,332 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 46 transitions. [2020-12-09 17:19:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 17:19:08,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 17:19:08,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash 303539960, now seen corresponding path program 1 times [2020-12-09 17:19:08,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513912060] [2020-12-09 17:19:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,361 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 17:19:08,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513912060] [2020-12-09 17:19:08,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349185990] [2020-12-09 17:19:08,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,363 INFO L87 Difference]: Start difference. First operand 31 states and 46 transitions. Second operand 4 states. [2020-12-09 17:19:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,374 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2020-12-09 17:19:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 17:19:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,375 INFO L225 Difference]: With dead ends: 39 [2020-12-09 17:19:08,375 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 17:19:08,375 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 17:19:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 17:19:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-09 17:19:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-12-09 17:19:08,377 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 16 [2020-12-09 17:19:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,378 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-12-09 17:19:08,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-12-09 17:19:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 17:19:08,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,379 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 17:19:08,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 17:19:08,379 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash 820019954, now seen corresponding path program 1 times [2020-12-09 17:19:08,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778362532] [2020-12-09 17:19:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,406 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 17:19:08,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778362532] [2020-12-09 17:19:08,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147598625] [2020-12-09 17:19:08,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,408 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 4 states. [2020-12-09 17:19:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,421 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-12-09 17:19:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 17:19:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,422 INFO L225 Difference]: With dead ends: 37 [2020-12-09 17:19:08,422 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 17:19:08,422 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 17:19:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 17:19:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-12-09 17:19:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 17:19:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2020-12-09 17:19:08,424 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 17 [2020-12-09 17:19:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,424 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2020-12-09 17:19:08,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2020-12-09 17:19:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:19:08,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:19:08,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:19:08,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 17:19:08,426 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK]=== [2020-12-09 17:19:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:19:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash -348969075, now seen corresponding path program 1 times [2020-12-09 17:19:08,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:19:08,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377338849] [2020-12-09 17:19:08,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:19:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:19:08,454 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 17:19:08,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377338849] [2020-12-09 17:19:08,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:19:08,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 17:19:08,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238100209] [2020-12-09 17:19:08,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:19:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:19:08,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:19:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:19:08,456 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand 4 states. [2020-12-09 17:19:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:19:08,473 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2020-12-09 17:19:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:19:08,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 17:19:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:19:08,473 INFO L225 Difference]: With dead ends: 31 [2020-12-09 17:19:08,474 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:19:08,474 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 17:19:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:19:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:19:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:19:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:19:08,474 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 17:19:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:19:08,475 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:19:08,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:19:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:19:08,475 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:19:08,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-09 17:19:08,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:19:08 BoogieIcfgContainer [2020-12-09 17:19:08,479 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:19:08,479 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:19:08,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:19:08,480 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:19:08,480 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:19:07" (3/4) ... [2020-12-09 17:19:08,483 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:19:08,493 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-12-09 17:19:08,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 17:19:08,494 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 17:19:08,495 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:19:08,547 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eaa4df28-361e-458c-ae02-5bffe20a3121/bin/utaipan/witness.graphml [2020-12-09 17:19:08,547 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:19:08,549 INFO L168 Benchmark]: Toolchain (without parser) took 1803.28 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 55.5 MB in the beginning and 86.8 MB in the end (delta: -31.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:19:08,550 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 96.5 MB. Free memory is still 71.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:19:08,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.19 ms. Allocated memory is still 96.5 MB. Free memory was 55.3 MB in the beginning and 68.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 96.5 MB. Free memory was 68.7 MB in the beginning and 67.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,551 INFO L168 Benchmark]: Boogie Preprocessor took 18.49 ms. Allocated memory is still 96.5 MB. Free memory was 66.7 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,551 INFO L168 Benchmark]: RCFGBuilder took 490.06 ms. Allocated memory is still 96.5 MB. Free memory was 65.4 MB in the beginning and 70.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,551 INFO L168 Benchmark]: TraceAbstraction took 1013.08 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 70.7 MB in the beginning and 91.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 755.8 kB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,552 INFO L168 Benchmark]: Witness Printer took 67.84 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 86.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 17:19:08,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 96.5 MB. Free memory is still 71.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.19 ms. Allocated memory is still 96.5 MB. Free memory was 55.3 MB in the beginning and 68.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 96.5 MB. Free memory was 68.7 MB in the beginning and 67.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.49 ms. Allocated memory is still 96.5 MB. Free memory was 66.7 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 490.06 ms. Allocated memory is still 96.5 MB. Free memory was 65.4 MB in the beginning and 70.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1013.08 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 70.7 MB in the beginning and 91.0 MB in the end (delta: -20.3 MB). Peak memory consumption was 755.8 kB. Max. memory is 16.1 GB. * Witness Printer took 67.84 ms. Allocated memory is still 117.4 MB. Free memory was 91.0 MB in the beginning and 86.8 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: 205]: 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, 35 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 728 SDtfs, 573 SDslu, 908 SDs, 0 SdLazy, 117 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 15 MinimizatonAttempts, 204 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 9196 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 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...