./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_12.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/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 fbb7e06bf350f46f725ea0ddc5d1215829061b3a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:42:21,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:21,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:21,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:21,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:22,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:22,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:22,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:22,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:22,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:22,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:22,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:22,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:22,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:22,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:22,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:22,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:22,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:22,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:22,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:22,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:22,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:22,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:22,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:22,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:22,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:22,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:22,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:22,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:22,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:22,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:22,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:22,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:22,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:22,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:22,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:22,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:22,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:22,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:22,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:22,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:22,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:42:22,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:22,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:22,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:22,089 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:22,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:22,089 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:22,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:22,090 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:22,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:22,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:22,090 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:22,091 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:22,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:22,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:22,091 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:22,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:22,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:22,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:22,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:22,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:22,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:42:22,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:22,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:42:22,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:22,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:22,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:42:22,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:22,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:42:22,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:22,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:22,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:22,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:22,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:22,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:22,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:42:22,096 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:22,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:22,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:42:22,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:22,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:22,097 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_e638929c-9d73-4585-b1ae-0617bafcd150/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2020-11-28 07:42:22,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:22,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:22,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:22,404 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:22,409 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:22,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_12.c [2020-11-28 07:42:22,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/data/ce2d337f9/4bcce0eda2d5441db51d3853004806ed/FLAG8a610da0d [2020-11-28 07:42:22,998 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:22,998 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/sv-benchmarks/c/locks/test_locks_12.c [2020-11-28 07:42:23,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/data/ce2d337f9/4bcce0eda2d5441db51d3853004806ed/FLAG8a610da0d [2020-11-28 07:42:23,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/data/ce2d337f9/4bcce0eda2d5441db51d3853004806ed [2020-11-28 07:42:23,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:23,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:23,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:23,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:23,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:23,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc5c0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23, skipping insertion in model container [2020-11-28 07:42:23,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:23,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:23,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:23,732 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:23,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:23,777 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:23,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23 WrapperNode [2020-11-28 07:42:23,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:23,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:23,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:23,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:23,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:23,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:23,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:23,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:23,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... [2020-11-28 07:42:23,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:23,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:23,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:23,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:23,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:23,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:23,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:42:23,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:42:23,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:24,738 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:42:24,738 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:42:24,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:24 BoogieIcfgContainer [2020-11-28 07:42:24,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:42:24,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:42:24,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:42:24,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:42:24,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:23" (1/3) ... [2020-11-28 07:42:24,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d0f9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:24, skipping insertion in model container [2020-11-28 07:42:24,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:23" (2/3) ... [2020-11-28 07:42:24,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d0f9f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:24, skipping insertion in model container [2020-11-28 07:42:24,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:24" (3/3) ... [2020-11-28 07:42:24,750 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-11-28 07:42:24,761 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:42:24,766 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:42:24,778 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:42:24,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:42:24,818 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:42:24,818 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:42:24,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:42:24,818 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:42:24,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:42:24,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:42:24,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:42:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-28 07:42:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:42:24,842 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:24,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:42:24,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:24,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1013843746, now seen corresponding path program 1 times [2020-11-28 07:42:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:24,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031391423] [2020-11-28 07:42:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031391423] [2020-11-28 07:42:25,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820312392] [2020-11-28 07:42:25,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,128 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-11-28 07:42:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,199 INFO L93 Difference]: Finished difference Result 66 states and 113 transitions. [2020-11-28 07:42:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:42:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,228 INFO L225 Difference]: With dead ends: 66 [2020-11-28 07:42:25,228 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 07:42:25,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 07:42:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2020-11-28 07:42:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 51 transitions. [2020-11-28 07:42:25,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 51 transitions. Word has length 6 [2020-11-28 07:42:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,282 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 51 transitions. [2020-11-28 07:42:25,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,283 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 51 transitions. [2020-11-28 07:42:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:42:25,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:42:25,285 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1364172354, now seen corresponding path program 1 times [2020-11-28 07:42:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244308581] [2020-11-28 07:42:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244308581] [2020-11-28 07:42:25,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37568790] [2020-11-28 07:42:25,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,413 INFO L87 Difference]: Start difference. First operand 29 states and 51 transitions. Second operand 4 states. [2020-11-28 07:42:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,460 INFO L93 Difference]: Finished difference Result 55 states and 95 transitions. [2020-11-28 07:42:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 07:42:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,465 INFO L225 Difference]: With dead ends: 55 [2020-11-28 07:42:25,465 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 07:42:25,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 07:42:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2020-11-28 07:42:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 50 transitions. [2020-11-28 07:42:25,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 50 transitions. Word has length 7 [2020-11-28 07:42:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,481 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 50 transitions. [2020-11-28 07:42:25,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 50 transitions. [2020-11-28 07:42:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:42:25,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:42:25,484 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash 660543027, now seen corresponding path program 1 times [2020-11-28 07:42:25,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40918763] [2020-11-28 07:42:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40918763] [2020-11-28 07:42:25,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528565329] [2020-11-28 07:42:25,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,605 INFO L87 Difference]: Start difference. First operand 29 states and 50 transitions. Second operand 4 states. [2020-11-28 07:42:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,645 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2020-11-28 07:42:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:42:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,647 INFO L225 Difference]: With dead ends: 53 [2020-11-28 07:42:25,648 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 07:42:25,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 07:42:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2020-11-28 07:42:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 49 transitions. [2020-11-28 07:42:25,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 49 transitions. Word has length 8 [2020-11-28 07:42:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,654 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 49 transitions. [2020-11-28 07:42:25,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 49 transitions. [2020-11-28 07:42:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:42:25,655 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:42:25,656 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash -997789261, now seen corresponding path program 1 times [2020-11-28 07:42:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881539075] [2020-11-28 07:42:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881539075] [2020-11-28 07:42:25,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275044163] [2020-11-28 07:42:25,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,720 INFO L87 Difference]: Start difference. First operand 29 states and 49 transitions. Second operand 4 states. [2020-11-28 07:42:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,745 INFO L93 Difference]: Finished difference Result 51 states and 85 transitions. [2020-11-28 07:42:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,746 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-28 07:42:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,747 INFO L225 Difference]: With dead ends: 51 [2020-11-28 07:42:25,747 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 07:42:25,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 07:42:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2020-11-28 07:42:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2020-11-28 07:42:25,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 9 [2020-11-28 07:42:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,753 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2020-11-28 07:42:25,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2020-11-28 07:42:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:42:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:42:25,755 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash -866482296, now seen corresponding path program 1 times [2020-11-28 07:42:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237974402] [2020-11-28 07:42:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237974402] [2020-11-28 07:42:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840953377] [2020-11-28 07:42:25,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,803 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand 4 states. [2020-11-28 07:42:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,837 INFO L93 Difference]: Finished difference Result 49 states and 80 transitions. [2020-11-28 07:42:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 07:42:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,839 INFO L225 Difference]: With dead ends: 49 [2020-11-28 07:42:25,839 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 07:42:25,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 07:42:25,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2020-11-28 07:42:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 47 transitions. [2020-11-28 07:42:25,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 47 transitions. Word has length 10 [2020-11-28 07:42:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,844 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 47 transitions. [2020-11-28 07:42:25,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 47 transitions. [2020-11-28 07:42:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:42:25,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:42:25,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1090933336, now seen corresponding path program 1 times [2020-11-28 07:42:25,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602248822] [2020-11-28 07:42:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:25,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602248822] [2020-11-28 07:42:25,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:25,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753049713] [2020-11-28 07:42:25,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:25,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,907 INFO L87 Difference]: Start difference. First operand 29 states and 47 transitions. Second operand 4 states. [2020-11-28 07:42:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:25,945 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2020-11-28 07:42:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:25,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:42:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:25,951 INFO L225 Difference]: With dead ends: 47 [2020-11-28 07:42:25,951 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 07:42:25,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 07:42:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2020-11-28 07:42:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 46 transitions. [2020-11-28 07:42:25,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 46 transitions. Word has length 11 [2020-11-28 07:42:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:25,956 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 46 transitions. [2020-11-28 07:42:25,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 46 transitions. [2020-11-28 07:42:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:42:25,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:25,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:25,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:42:25,957 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 541019357, now seen corresponding path program 1 times [2020-11-28 07:42:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:25,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045509559] [2020-11-28 07:42:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045509559] [2020-11-28 07:42:26,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814536782] [2020-11-28 07:42:26,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,014 INFO L87 Difference]: Start difference. First operand 29 states and 46 transitions. Second operand 4 states. [2020-11-28 07:42:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,044 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2020-11-28 07:42:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 07:42:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,045 INFO L225 Difference]: With dead ends: 45 [2020-11-28 07:42:26,046 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 07:42:26,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 07:42:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-11-28 07:42:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 45 transitions. [2020-11-28 07:42:26,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 45 transitions. Word has length 12 [2020-11-28 07:42:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,050 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 45 transitions. [2020-11-28 07:42:26,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 45 transitions. [2020-11-28 07:42:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:42:26,051 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:26,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:26,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:42:26,051 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash -408054371, now seen corresponding path program 1 times [2020-11-28 07:42:26,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:26,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966428425] [2020-11-28 07:42:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966428425] [2020-11-28 07:42:26,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871058088] [2020-11-28 07:42:26,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,120 INFO L87 Difference]: Start difference. First operand 29 states and 45 transitions. Second operand 4 states. [2020-11-28 07:42:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,148 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2020-11-28 07:42:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-28 07:42:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,149 INFO L225 Difference]: With dead ends: 43 [2020-11-28 07:42:26,149 INFO L226 Difference]: Without dead ends: 41 [2020-11-28 07:42:26,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-28 07:42:26,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-11-28 07:42:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 44 transitions. [2020-11-28 07:42:26,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 44 transitions. Word has length 13 [2020-11-28 07:42:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,153 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 44 transitions. [2020-11-28 07:42:26,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 44 transitions. [2020-11-28 07:42:26,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:42:26,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:26,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:26,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:42:26,155 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:26,155 INFO L82 PathProgramCache]: Analyzing trace with hash 235431474, now seen corresponding path program 1 times [2020-11-28 07:42:26,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:26,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014284068] [2020-11-28 07:42:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014284068] [2020-11-28 07:42:26,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228908852] [2020-11-28 07:42:26,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,218 INFO L87 Difference]: Start difference. First operand 29 states and 44 transitions. Second operand 4 states. [2020-11-28 07:42:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,241 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2020-11-28 07:42:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-28 07:42:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,242 INFO L225 Difference]: With dead ends: 41 [2020-11-28 07:42:26,242 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 07:42:26,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 07:42:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-11-28 07:42:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 43 transitions. [2020-11-28 07:42:26,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 43 transitions. Word has length 14 [2020-11-28 07:42:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,247 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 43 transitions. [2020-11-28 07:42:26,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 43 transitions. [2020-11-28 07:42:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:42:26,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:26,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:26,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:42:26,248 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:26,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1291343470, now seen corresponding path program 1 times [2020-11-28 07:42:26,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:26,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697742185] [2020-11-28 07:42:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697742185] [2020-11-28 07:42:26,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027397573] [2020-11-28 07:42:26,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,292 INFO L87 Difference]: Start difference. First operand 29 states and 43 transitions. Second operand 4 states. [2020-11-28 07:42:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,325 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-11-28 07:42:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 07:42:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,326 INFO L225 Difference]: With dead ends: 39 [2020-11-28 07:42:26,326 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 07:42:26,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 07:42:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-11-28 07:42:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2020-11-28 07:42:26,330 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 15 [2020-11-28 07:42:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,330 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2020-11-28 07:42:26,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2020-11-28 07:42:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:42:26,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:26,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:26,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:42:26,353 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:26,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:26,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1376726137, now seen corresponding path program 1 times [2020-11-28 07:42:26,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:26,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437588472] [2020-11-28 07:42:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437588472] [2020-11-28 07:42:26,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194524309] [2020-11-28 07:42:26,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,414 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand 4 states. [2020-11-28 07:42:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,435 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-11-28 07:42:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-28 07:42:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,436 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:42:26,437 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:42:26,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:42:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-11-28 07:42:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:42:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 41 transitions. [2020-11-28 07:42:26,440 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 41 transitions. Word has length 16 [2020-11-28 07:42:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,440 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 41 transitions. [2020-11-28 07:42:26,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 41 transitions. [2020-11-28 07:42:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 07:42:26,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:26,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:26,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:42:26,442 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:26,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:26,442 INFO L82 PathProgramCache]: Analyzing trace with hash 271378823, now seen corresponding path program 1 times [2020-11-28 07:42:26,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:26,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934009103] [2020-11-28 07:42:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934009103] [2020-11-28 07:42:26,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:26,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:42:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331497092] [2020-11-28 07:42:26,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,501 INFO L87 Difference]: Start difference. First operand 29 states and 41 transitions. Second operand 4 states. [2020-11-28 07:42:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:26,521 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2020-11-28 07:42:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:42:26,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 07:42:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:26,522 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:42:26,522 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:42:26,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:42:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:42:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:42:26,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:42:26,523 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-28 07:42:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:26,524 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:42:26,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:42:26,524 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:42:26,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:42:26,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:42:26,552 INFO L274 CegarLoopResult]: For program point L184(line 184) no Hoare annotation was computed. [2020-11-28 07:42:26,552 INFO L270 CegarLoopResult]: At program point L184-1(lines 7 193) the Hoare annotation is: false [2020-11-28 07:42:26,552 INFO L274 CegarLoopResult]: For program point L168-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L169(line 169) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L153-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L138-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L122-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L277 CegarLoopResult]: At program point L189(lines 7 193) the Hoare annotation is: true [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point L173-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,553 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L174(line 174) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L158-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L277 CegarLoopResult]: At program point L192(lines 6 193) the Hoare annotation is: true [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L159(line 159) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L143-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L128-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L178-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-11-28 07:42:26,554 INFO L274 CegarLoopResult]: For program point L179(line 179) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L163-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L164(line 164) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L148-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L49(lines 49 51) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L133-1(lines 47 188) no Hoare annotation was computed. [2020-11-28 07:42:26,555 INFO L277 CegarLoopResult]: At program point L183-1(lines 47 188) the Hoare annotation is: true [2020-11-28 07:42:26,555 INFO L274 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-11-28 07:42:26,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:26 BoogieIcfgContainer [2020-11-28 07:42:26,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:26,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:26,567 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:26,568 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:26,568 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:24" (3/4) ... [2020-11-28 07:42:26,573 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:42:26,591 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-28 07:42:26,592 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-28 07:42:26,592 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:42:26,593 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:42:26,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e638929c-9d73-4585-b1ae-0617bafcd150/bin/utaipan/witness.graphml [2020-11-28 07:42:26,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:26,671 INFO L168 Benchmark]: Toolchain (without parser) took 3288.30 ms. Allocated memory was 94.4 MB in the beginning and 132.1 MB in the end (delta: 37.7 MB). Free memory was 64.8 MB in the beginning and 86.1 MB in the end (delta: -21.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,671 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 53.0 MB in the end (delta: 36.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.45 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 71.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,673 INFO L168 Benchmark]: Boogie Preprocessor took 27.42 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 68.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,673 INFO L168 Benchmark]: RCFGBuilder took 889.17 ms. Allocated memory was 94.4 MB in the beginning and 132.1 MB in the end (delta: 37.7 MB). Free memory was 68.5 MB in the beginning and 102.3 MB in the end (delta: -33.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,674 INFO L168 Benchmark]: TraceAbstraction took 1824.80 ms. Allocated memory is still 132.1 MB. Free memory was 101.6 MB in the beginning and 90.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,674 INFO L168 Benchmark]: Witness Printer took 101.90 ms. Allocated memory is still 132.1 MB. Free memory was 90.3 MB in the beginning and 86.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:26,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 53.1 MB in the beginning and 53.0 MB in the end (delta: 36.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.45 ms. Allocated memory is still 94.4 MB. Free memory was 64.5 MB in the beginning and 71.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.11 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.42 ms. Allocated memory is still 94.4 MB. Free memory was 70.1 MB in the beginning and 68.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 889.17 ms. Allocated memory was 94.4 MB in the beginning and 132.1 MB in the end (delta: 37.7 MB). Free memory was 68.5 MB in the beginning and 102.3 MB in the end (delta: -33.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1824.80 ms. Allocated memory is still 132.1 MB. Free memory was 101.6 MB in the beginning and 90.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Witness Printer took 101.90 ms. Allocated memory is still 132.1 MB. Free memory was 90.3 MB in the beginning and 86.1 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 12, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 527 SDtfs, 446 SDslu, 778 SDs, 0 SdLazy, 108 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 12 MinimizatonAttempts, 176 StatesRemovedByMinimization, 11 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, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 7490 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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...