./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_11.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a93221bc263791497331acd2a7a0150037c621aa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 16:36:04,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:36:04,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:36:04,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:36:04,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:36:04,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:36:04,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:36:04,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:36:04,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:36:04,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:36:04,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:36:04,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:36:04,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:36:04,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:36:04,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:36:04,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:36:04,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:36:04,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:36:04,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:36:04,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:36:04,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:36:04,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:36:04,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:36:04,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:36:04,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:36:04,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:36:04,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:36:04,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:36:04,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:36:04,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:36:04,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:36:04,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:36:04,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:36:04,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:36:04,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:36:04,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:36:04,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:36:04,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:36:04,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:36:04,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:36:04,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:36:04,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:36:04,744 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:36:04,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:36:04,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:36:04,745 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:36:04,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:36:04,745 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:36:04,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:36:04,745 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:36:04,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:36:04,746 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:36:04,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:36:04,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:36:04,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:36:04,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:36:04,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:36:04,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:36:04,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:36:04,750 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_e41b24d9-a4b7-407c-ad6d-571f16901276/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a93221bc263791497331acd2a7a0150037c621aa [2020-12-09 16:36:04,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:36:04,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:36:04,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:36:04,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:36:04,933 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:36:04,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_11.c [2020-12-09 16:36:04,973 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/data/a6fd9c07d/cb16a371c6d046e683999206d9977702/FLAGdd61b2a31 [2020-12-09 16:36:05,391 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:36:05,391 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/sv-benchmarks/c/locks/test_locks_11.c [2020-12-09 16:36:05,397 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/data/a6fd9c07d/cb16a371c6d046e683999206d9977702/FLAGdd61b2a31 [2020-12-09 16:36:05,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/data/a6fd9c07d/cb16a371c6d046e683999206d9977702 [2020-12-09 16:36:05,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:36:05,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:36:05,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:36:05,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:36:05,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:36:05,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1161ac71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05, skipping insertion in model container [2020-12-09 16:36:05,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:36:05,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:36:05,538 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_e41b24d9-a4b7-407c-ad6d-571f16901276/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2020-12-09 16:36:05,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:36:05,548 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:36:05,565 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_e41b24d9-a4b7-407c-ad6d-571f16901276/sv-benchmarks/c/locks/test_locks_11.c[4246,4259] [2020-12-09 16:36:05,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:36:05,576 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:36:05,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05 WrapperNode [2020-12-09 16:36:05,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:36:05,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:36:05,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:36:05,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:36:05,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:36:05,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:36:05,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:36:05,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:36:05,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... [2020-12-09 16:36:05,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:36:05,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:36:05,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:36:05,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:36:05,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/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 16:36:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:36:05,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:36:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:36:05,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:36:06,024 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:36:06,024 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 16:36:06,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:36:06 BoogieIcfgContainer [2020-12-09 16:36:06,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:36:06,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:36:06,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:36:06,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:36:06,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:36:05" (1/3) ... [2020-12-09 16:36:06,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2edf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:36:06, skipping insertion in model container [2020-12-09 16:36:06,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:36:05" (2/3) ... [2020-12-09 16:36:06,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b2edf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:36:06, skipping insertion in model container [2020-12-09 16:36:06,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:36:06" (3/3) ... [2020-12-09 16:36:06,034 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-12-09 16:36:06,046 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:36:06,049 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:36:06,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:36:06,081 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:36:06,081 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:36:06,081 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:36:06,081 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:36:06,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:36:06,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:36:06,082 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:36:06,082 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:36:06,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-09 16:36:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:36:06,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,098 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1558458986, now seen corresponding path program 1 times [2020-12-09 16:36:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372667123] [2020-12-09 16:36:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:36:06,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372667123] [2020-12-09 16:36:06,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387321779] [2020-12-09 16:36:06,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,292 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-12-09 16:36:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,329 INFO L93 Difference]: Finished difference Result 62 states and 105 transitions. [2020-12-09 16:36:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 16:36:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,340 INFO L225 Difference]: With dead ends: 62 [2020-12-09 16:36:06,340 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 16:36:06,343 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 16:36:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 16:36:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2020-12-09 16:36:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 47 transitions. [2020-12-09 16:36:06,371 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 47 transitions. Word has length 6 [2020-12-09 16:36:06,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,372 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 47 transitions. [2020-12-09 16:36:06,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 47 transitions. [2020-12-09 16:36:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:36:06,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:36:06,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1067375286, now seen corresponding path program 1 times [2020-12-09 16:36:06,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433406855] [2020-12-09 16:36:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,428 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 16:36:06,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433406855] [2020-12-09 16:36:06,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132089241] [2020-12-09 16:36:06,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,432 INFO L87 Difference]: Start difference. First operand 27 states and 47 transitions. Second operand 4 states. [2020-12-09 16:36:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,452 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2020-12-09 16:36:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 16:36:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,454 INFO L225 Difference]: With dead ends: 51 [2020-12-09 16:36:06,454 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 16:36:06,455 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 16:36:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 16:36:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2020-12-09 16:36:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 46 transitions. [2020-12-09 16:36:06,460 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 46 transitions. Word has length 7 [2020-12-09 16:36:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,460 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 46 transitions. [2020-12-09 16:36:06,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 46 transitions. [2020-12-09 16:36:06,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 16:36:06,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:36:06,461 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1271317867, now seen corresponding path program 1 times [2020-12-09 16:36:06,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616122716] [2020-12-09 16:36:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,514 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 16:36:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616122716] [2020-12-09 16:36:06,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224543484] [2020-12-09 16:36:06,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,517 INFO L87 Difference]: Start difference. First operand 27 states and 46 transitions. Second operand 4 states. [2020-12-09 16:36:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,533 INFO L93 Difference]: Finished difference Result 49 states and 82 transitions. [2020-12-09 16:36:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 16:36:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,535 INFO L225 Difference]: With dead ends: 49 [2020-12-09 16:36:06,535 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 16:36:06,535 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 16:36:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 16:36:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-12-09 16:36:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 45 transitions. [2020-12-09 16:36:06,538 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 45 transitions. Word has length 8 [2020-12-09 16:36:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,539 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 45 transitions. [2020-12-09 16:36:06,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 45 transitions. [2020-12-09 16:36:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:36:06,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 16:36:06,540 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash 756361919, now seen corresponding path program 1 times [2020-12-09 16:36:06,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017605029] [2020-12-09 16:36:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,571 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 16:36:06,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017605029] [2020-12-09 16:36:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234051257] [2020-12-09 16:36:06,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,573 INFO L87 Difference]: Start difference. First operand 27 states and 45 transitions. Second operand 4 states. [2020-12-09 16:36:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,587 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2020-12-09 16:36:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 16:36:06,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,588 INFO L225 Difference]: With dead ends: 47 [2020-12-09 16:36:06,588 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 16:36:06,589 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 16:36:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 16:36:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2020-12-09 16:36:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 44 transitions. [2020-12-09 16:36:06,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 44 transitions. Word has length 9 [2020-12-09 16:36:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,592 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 44 transitions. [2020-12-09 16:36:06,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 44 transitions. [2020-12-09 16:36:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 16:36:06,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 16:36:06,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1972597056, now seen corresponding path program 1 times [2020-12-09 16:36:06,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058283133] [2020-12-09 16:36:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,625 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 16:36:06,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058283133] [2020-12-09 16:36:06,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804005210] [2020-12-09 16:36:06,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,627 INFO L87 Difference]: Start difference. First operand 27 states and 44 transitions. Second operand 4 states. [2020-12-09 16:36:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,642 INFO L93 Difference]: Finished difference Result 45 states and 72 transitions. [2020-12-09 16:36:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 16:36:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,644 INFO L225 Difference]: With dead ends: 45 [2020-12-09 16:36:06,644 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 16:36:06,644 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 16:36:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 16:36:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2020-12-09 16:36:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 43 transitions. [2020-12-09 16:36:06,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 43 transitions. Word has length 10 [2020-12-09 16:36:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,648 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 43 transitions. [2020-12-09 16:36:06,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 43 transitions. [2020-12-09 16:36:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:36:06,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 16:36:06,649 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1021180980, now seen corresponding path program 1 times [2020-12-09 16:36:06,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455364065] [2020-12-09 16:36:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,684 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 16:36:06,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455364065] [2020-12-09 16:36:06,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350811531] [2020-12-09 16:36:06,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,685 INFO L87 Difference]: Start difference. First operand 27 states and 43 transitions. Second operand 4 states. [2020-12-09 16:36:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,701 INFO L93 Difference]: Finished difference Result 43 states and 67 transitions. [2020-12-09 16:36:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 16:36:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,703 INFO L225 Difference]: With dead ends: 43 [2020-12-09 16:36:06,703 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 16:36:06,703 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 16:36:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 16:36:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2020-12-09 16:36:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2020-12-09 16:36:06,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 11 [2020-12-09 16:36:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,707 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2020-12-09 16:36:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2020-12-09 16:36:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 16:36:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 16:36:06,708 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1592054037, now seen corresponding path program 1 times [2020-12-09 16:36:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852774776] [2020-12-09 16:36:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,741 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 16:36:06,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852774776] [2020-12-09 16:36:06,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507501610] [2020-12-09 16:36:06,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,744 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand 4 states. [2020-12-09 16:36:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,758 INFO L93 Difference]: Finished difference Result 41 states and 62 transitions. [2020-12-09 16:36:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 16:36:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,759 INFO L225 Difference]: With dead ends: 41 [2020-12-09 16:36:06,759 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 16:36:06,760 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 16:36:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 16:36:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-12-09 16:36:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2020-12-09 16:36:06,763 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 12 [2020-12-09 16:36:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,763 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2020-12-09 16:36:06,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2020-12-09 16:36:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 16:36:06,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 16:36:06,765 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2109249961, now seen corresponding path program 1 times [2020-12-09 16:36:06,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572008668] [2020-12-09 16:36:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,795 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 16:36:06,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572008668] [2020-12-09 16:36:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222192983] [2020-12-09 16:36:06,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,800 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand 4 states. [2020-12-09 16:36:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,812 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2020-12-09 16:36:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 16:36:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,813 INFO L225 Difference]: With dead ends: 39 [2020-12-09 16:36:06,813 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 16:36:06,813 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 16:36:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 16:36:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-12-09 16:36:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2020-12-09 16:36:06,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 13 [2020-12-09 16:36:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,815 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2020-12-09 16:36:06,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2020-12-09 16:36:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 16:36:06,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 16:36:06,816 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 962454762, now seen corresponding path program 1 times [2020-12-09 16:36:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339951661] [2020-12-09 16:36:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,837 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 16:36:06,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339951661] [2020-12-09 16:36:06,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680804554] [2020-12-09 16:36:06,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,839 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand 4 states. [2020-12-09 16:36:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,850 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2020-12-09 16:36:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 16:36:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,851 INFO L225 Difference]: With dead ends: 37 [2020-12-09 16:36:06,851 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 16:36:06,851 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 16:36:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 16:36:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-12-09 16:36:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-12-09 16:36:06,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 14 [2020-12-09 16:36:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,853 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-12-09 16:36:06,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2020-12-09 16:36:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 16:36:06,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 16:36:06,854 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -228457698, now seen corresponding path program 1 times [2020-12-09 16:36:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656087063] [2020-12-09 16:36:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,876 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 16:36:06,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656087063] [2020-12-09 16:36:06,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797568998] [2020-12-09 16:36:06,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,878 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand 4 states. [2020-12-09 16:36:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,890 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-12-09 16:36:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 16:36:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,891 INFO L225 Difference]: With dead ends: 35 [2020-12-09 16:36:06,891 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 16:36:06,891 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 16:36:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 16:36:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-12-09 16:36:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 16:36:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2020-12-09 16:36:06,894 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 15 [2020-12-09 16:36:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,894 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2020-12-09 16:36:06,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2020-12-09 16:36:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 16:36:06,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:36:06,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:36:06,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 16:36:06,895 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:36:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:36:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1507962047, now seen corresponding path program 1 times [2020-12-09 16:36:06,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:36:06,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149137865] [2020-12-09 16:36:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:36:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:36:06,924 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 16:36:06,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149137865] [2020-12-09 16:36:06,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:36:06,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 16:36:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073499401] [2020-12-09 16:36:06,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:36:06,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:36:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:36:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:36:06,926 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand 4 states. [2020-12-09 16:36:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:36:06,937 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2020-12-09 16:36:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:36:06,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 16:36:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:36:06,938 INFO L225 Difference]: With dead ends: 29 [2020-12-09 16:36:06,938 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 16:36:06,938 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 16:36:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 16:36:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 16:36:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 16:36:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 16:36:06,939 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-12-09 16:36:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:36:06,939 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 16:36:06,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:36:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 16:36:06,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 16:36:06,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 16:36:06,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 16:36:06,949 INFO L262 CegarLoopResult]: For program point L159-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L160(line 160) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L119-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L144-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L265 CegarLoopResult]: At program point L169-1(lines 44 174) the Hoare annotation is: true [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L265 CegarLoopResult]: At program point L178(lines 6 179) the Hoare annotation is: true [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L145(line 145) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L170(line 170) no Hoare annotation was computed. [2020-12-09 16:36:06,950 INFO L258 CegarLoopResult]: At program point L170-1(lines 7 179) the Hoare annotation is: false [2020-12-09 16:36:06,950 INFO L262 CegarLoopResult]: For program point L129-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L154-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L113-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L155(line 155) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L139-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L164-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 177) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L165(line 165) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L124-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L149-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L150(line 150) no Hoare annotation was computed. [2020-12-09 16:36:06,951 INFO L265 CegarLoopResult]: At program point L175(lines 7 179) the Hoare annotation is: true [2020-12-09 16:36:06,951 INFO L262 CegarLoopResult]: For program point L134-1(lines 44 174) no Hoare annotation was computed. [2020-12-09 16:36:06,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:36:06 BoogieIcfgContainer [2020-12-09 16:36:06,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:36:06,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:36:06,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:36:06,959 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:36:06,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:36:06" (3/4) ... [2020-12-09 16:36:06,961 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 16:36:06,970 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-09 16:36:06,970 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 16:36:06,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 16:36:06,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 16:36:07,018 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e41b24d9-a4b7-407c-ad6d-571f16901276/bin/utaipan/witness.graphml [2020-12-09 16:36:07,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:36:07,020 INFO L168 Benchmark]: Toolchain (without parser) took 1610.22 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 62.9 MB in the beginning and 53.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,020 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 67.1 MB. Free memory was 32.5 MB in the beginning and 32.4 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:36:07,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.00 ms. Allocated memory is still 92.3 MB. Free memory was 62.7 MB in the beginning and 52.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 92.3 MB. Free memory was 52.1 MB in the beginning and 50.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,021 INFO L168 Benchmark]: Boogie Preprocessor took 17.06 ms. Allocated memory is still 92.3 MB. Free memory was 50.4 MB in the beginning and 49.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:36:07,022 INFO L168 Benchmark]: RCFGBuilder took 405.04 ms. Allocated memory is still 92.3 MB. Free memory was 49.0 MB in the beginning and 69.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,022 INFO L168 Benchmark]: TraceAbstraction took 930.52 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 68.6 MB in the beginning and 57.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,022 INFO L168 Benchmark]: Witness Printer took 59.89 ms. Allocated memory is still 111.1 MB. Free memory was 57.4 MB in the beginning and 53.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:36:07,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 67.1 MB. Free memory was 32.5 MB in the beginning and 32.4 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 167.00 ms. Allocated memory is still 92.3 MB. Free memory was 62.7 MB in the beginning and 52.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 92.3 MB. Free memory was 52.1 MB in the beginning and 50.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.06 ms. Allocated memory is still 92.3 MB. Free memory was 50.4 MB in the beginning and 49.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 405.04 ms. Allocated memory is still 92.3 MB. Free memory was 49.0 MB in the beginning and 69.0 MB in the end (delta: -20.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 930.52 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 68.6 MB in the beginning and 57.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 16.1 GB. * Witness Printer took 59.89 ms. Allocated memory is still 111.1 MB. Free memory was 57.4 MB in the beginning and 53.1 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: 177]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 445 SDtfs, 376 SDslu, 653 SDs, 0 SdLazy, 99 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 11 MinimizatonAttempts, 150 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 6050 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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...