./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_10.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_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/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 6423b7e5fbcc52c08e52aff49c79db620dd407c4 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:03:01,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:03:01,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:03:01,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:03:01,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:03:01,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:03:01,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:03:01,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:03:01,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:03:01,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:03:01,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:03:01,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:03:01,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:03:01,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:03:01,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:03:01,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:03:01,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:03:01,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:03:01,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:03:01,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:03:01,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:03:01,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:03:01,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:03:01,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:03:01,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:03:01,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:03:01,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:03:01,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:03:01,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:03:01,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:03:01,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:03:01,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:03:01,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:03:01,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:03:01,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:03:01,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:03:01,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:03:01,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:03:01,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:03:01,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:03:01,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:03:01,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:03:01,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:03:01,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:03:01,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:03:01,197 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:03:01,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:03:01,197 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:03:01,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:03:01,198 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:03:01,198 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:03:01,199 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:03:01,200 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:03:01,200 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:03:01,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:03:01,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:03:01,201 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:03:01,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:03:01,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:03:01,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:03:01,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:03:01,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:03:01,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:03:01,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:03:01,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:03:01,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:03:01,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:03:01,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:03:01,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:03:01,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:03:01,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:03:01,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:03:01,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:03:01,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:03:01,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:03:01,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:03:01,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:03:01,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:03:01,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:03:01,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:03:01,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:03:01,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:03:01,211 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_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6423b7e5fbcc52c08e52aff49c79db620dd407c4 [2020-11-22 13:03:01,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:03:01,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:03:01,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:03:01,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:03:01,537 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:03:01,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_10.c [2020-11-22 13:03:01,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/data/7c826df9b/d4af451d532b4c0d97bac2c4f7d69122/FLAG41643f4f1 [2020-11-22 13:03:02,165 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:03:02,170 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/sv-benchmarks/c/locks/test_locks_10.c [2020-11-22 13:03:02,188 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/data/7c826df9b/d4af451d532b4c0d97bac2c4f7d69122/FLAG41643f4f1 [2020-11-22 13:03:02,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/data/7c826df9b/d4af451d532b4c0d97bac2c4f7d69122 [2020-11-22 13:03:02,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:03:02,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:03:02,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:02,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:03:02,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:03:02,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463a522a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02, skipping insertion in model container [2020-11-22 13:03:02,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:03:02,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:03:02,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:02,813 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:03:02,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:03:02,849 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:03:02,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02 WrapperNode [2020-11-22 13:03:02,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:03:02,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:02,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:03:02,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:03:02,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:03:02,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:03:02,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:03:02,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:03:02,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... [2020-11-22 13:03:02,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:03:02,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:03:02,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:03:02,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:03:02,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/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 [2020-11-22 13:03:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:03:02,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:03:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:03:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:03:03,620 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:03:03,620 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:03:03,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:03 BoogieIcfgContainer [2020-11-22 13:03:03,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:03:03,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:03:03,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:03:03,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:03:03,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:03:02" (1/3) ... [2020-11-22 13:03:03,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b66e3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:03, skipping insertion in model container [2020-11-22 13:03:03,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:03:02" (2/3) ... [2020-11-22 13:03:03,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b66e3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:03:03, skipping insertion in model container [2020-11-22 13:03:03,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:03" (3/3) ... [2020-11-22 13:03:03,630 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-11-22 13:03:03,646 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:03:03,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:03:03,661 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:03:03,693 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:03:03,693 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:03:03,693 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:03:03,693 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:03:03,693 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:03:03,694 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:03:03,694 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:03:03,694 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:03:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-22 13:03:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:03:03,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:03,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:03:03,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:03,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1988378876, now seen corresponding path program 1 times [2020-11-22 13:03:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:03,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637530653] [2020-11-22 13:03:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:03,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637530653] [2020-11-22 13:03:03,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:03,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346304452] [2020-11-22 13:03:03,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:03,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:03,997 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-11-22 13:03:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,061 INFO L93 Difference]: Finished difference Result 58 states and 97 transitions. [2020-11-22 13:03:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-22 13:03:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,078 INFO L225 Difference]: With dead ends: 58 [2020-11-22 13:03:04,078 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 13:03:04,086 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 [2020-11-22 13:03:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 13:03:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2020-11-22 13:03:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 43 transitions. [2020-11-22 13:03:04,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 43 transitions. Word has length 6 [2020-11-22 13:03:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,127 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 43 transitions. [2020-11-22 13:03:04,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 43 transitions. [2020-11-22 13:03:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:03:04,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:03:04,128 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1509989664, now seen corresponding path program 1 times [2020-11-22 13:03:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478048283] [2020-11-22 13:03:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478048283] [2020-11-22 13:03:04,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051193336] [2020-11-22 13:03:04,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,232 INFO L87 Difference]: Start difference. First operand 25 states and 43 transitions. Second operand 4 states. [2020-11-22 13:03:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,268 INFO L93 Difference]: Finished difference Result 47 states and 79 transitions. [2020-11-22 13:03:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:03:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,270 INFO L225 Difference]: With dead ends: 47 [2020-11-22 13:03:04,270 INFO L226 Difference]: Without dead ends: 45 [2020-11-22 13:03:04,271 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 [2020-11-22 13:03:04,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-22 13:03:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 25. [2020-11-22 13:03:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 42 transitions. [2020-11-22 13:03:04,275 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 42 transitions. Word has length 7 [2020-11-22 13:03:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,276 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 42 transitions. [2020-11-22 13:03:04,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 42 transitions. [2020-11-22 13:03:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:03:04,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:03:04,277 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash 435174361, now seen corresponding path program 1 times [2020-11-22 13:03:04,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49859399] [2020-11-22 13:03:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49859399] [2020-11-22 13:03:04,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000157277] [2020-11-22 13:03:04,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,369 INFO L87 Difference]: Start difference. First operand 25 states and 42 transitions. Second operand 4 states. [2020-11-22 13:03:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,402 INFO L93 Difference]: Finished difference Result 45 states and 74 transitions. [2020-11-22 13:03:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-22 13:03:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,404 INFO L225 Difference]: With dead ends: 45 [2020-11-22 13:03:04,404 INFO L226 Difference]: Without dead ends: 43 [2020-11-22 13:03:04,405 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 [2020-11-22 13:03:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-22 13:03:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2020-11-22 13:03:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 41 transitions. [2020-11-22 13:03:04,409 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 41 transitions. Word has length 8 [2020-11-22 13:03:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,409 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 41 transitions. [2020-11-22 13:03:04,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 41 transitions. [2020-11-22 13:03:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 13:03:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:03:04,411 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,411 INFO L82 PathProgramCache]: Analyzing trace with hash 605717333, now seen corresponding path program 1 times [2020-11-22 13:03:04,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015334016] [2020-11-22 13:03:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015334016] [2020-11-22 13:03:04,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765624782] [2020-11-22 13:03:04,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,497 INFO L87 Difference]: Start difference. First operand 25 states and 41 transitions. Second operand 4 states. [2020-11-22 13:03:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,530 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2020-11-22 13:03:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-22 13:03:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,532 INFO L225 Difference]: With dead ends: 43 [2020-11-22 13:03:04,532 INFO L226 Difference]: Without dead ends: 41 [2020-11-22 13:03:04,532 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 [2020-11-22 13:03:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-22 13:03:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 25. [2020-11-22 13:03:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 40 transitions. [2020-11-22 13:03:04,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 40 transitions. Word has length 9 [2020-11-22 13:03:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,537 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 40 transitions. [2020-11-22 13:03:04,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 40 transitions. [2020-11-22 13:03:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 13:03:04,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:03:04,538 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1597582510, now seen corresponding path program 1 times [2020-11-22 13:03:04,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454770148] [2020-11-22 13:03:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454770148] [2020-11-22 13:03:04,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594848729] [2020-11-22 13:03:04,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,615 INFO L87 Difference]: Start difference. First operand 25 states and 40 transitions. Second operand 4 states. [2020-11-22 13:03:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,638 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2020-11-22 13:03:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-22 13:03:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,641 INFO L225 Difference]: With dead ends: 41 [2020-11-22 13:03:04,643 INFO L226 Difference]: Without dead ends: 39 [2020-11-22 13:03:04,644 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 [2020-11-22 13:03:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-22 13:03:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2020-11-22 13:03:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 39 transitions. [2020-11-22 13:03:04,648 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 39 transitions. Word has length 10 [2020-11-22 13:03:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,648 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 39 transitions. [2020-11-22 13:03:04,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 39 transitions. [2020-11-22 13:03:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:03:04,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 13:03:04,651 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2014335030, now seen corresponding path program 1 times [2020-11-22 13:03:04,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185134013] [2020-11-22 13:03:04,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185134013] [2020-11-22 13:03:04,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522925131] [2020-11-22 13:03:04,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,715 INFO L87 Difference]: Start difference. First operand 25 states and 39 transitions. Second operand 4 states. [2020-11-22 13:03:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,745 INFO L93 Difference]: Finished difference Result 39 states and 59 transitions. [2020-11-22 13:03:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-22 13:03:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,751 INFO L225 Difference]: With dead ends: 39 [2020-11-22 13:03:04,751 INFO L226 Difference]: Without dead ends: 37 [2020-11-22 13:03:04,751 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 [2020-11-22 13:03:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-22 13:03:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-11-22 13:03:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 38 transitions. [2020-11-22 13:03:04,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 38 transitions. Word has length 11 [2020-11-22 13:03:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,755 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 38 transitions. [2020-11-22 13:03:04,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 38 transitions. [2020-11-22 13:03:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 13:03:04,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 13:03:04,757 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1980338563, now seen corresponding path program 1 times [2020-11-22 13:03:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256239867] [2020-11-22 13:03:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256239867] [2020-11-22 13:03:04,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975411592] [2020-11-22 13:03:04,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,828 INFO L87 Difference]: Start difference. First operand 25 states and 38 transitions. Second operand 4 states. [2020-11-22 13:03:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,847 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-11-22 13:03:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 13:03:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,848 INFO L225 Difference]: With dead ends: 37 [2020-11-22 13:03:04,848 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:03:04,849 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 [2020-11-22 13:03:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:03:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-11-22 13:03:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2020-11-22 13:03:04,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 12 [2020-11-22 13:03:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,853 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2020-11-22 13:03:04,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2020-11-22 13:03:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:03:04,854 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:03:04,855 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1261168703, now seen corresponding path program 1 times [2020-11-22 13:03:04,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898386758] [2020-11-22 13:03:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898386758] [2020-11-22 13:03:04,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424862164] [2020-11-22 13:03:04,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,899 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand 4 states. [2020-11-22 13:03:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,925 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2020-11-22 13:03:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 13:03:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,926 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:03:04,927 INFO L226 Difference]: Without dead ends: 33 [2020-11-22 13:03:04,927 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 [2020-11-22 13:03:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-22 13:03:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-11-22 13:03:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2020-11-22 13:03:04,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 13 [2020-11-22 13:03:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:04,931 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2020-11-22 13:03:04,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2020-11-22 13:03:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 13:03:04,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:04,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:04,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:03:04,933 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash 441739864, now seen corresponding path program 1 times [2020-11-22 13:03:04,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:04,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775778430] [2020-11-22 13:03:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:04,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775778430] [2020-11-22 13:03:04,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:04,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002329807] [2020-11-22 13:03:04,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:04,976 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand 4 states. [2020-11-22 13:03:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:04,995 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-11-22 13:03:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:04,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 13:03:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:04,997 INFO L225 Difference]: With dead ends: 33 [2020-11-22 13:03:04,997 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 13:03:04,997 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 [2020-11-22 13:03:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 13:03:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-11-22 13:03:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 13:03:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-11-22 13:03:05,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2020-11-22 13:03:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,001 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-11-22 13:03:05,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-11-22 13:03:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 13:03:05,002 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:03:05,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:03:05,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 13:03:05,002 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:03:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:03:05,003 INFO L82 PathProgramCache]: Analyzing trace with hash 809249972, now seen corresponding path program 1 times [2020-11-22 13:03:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:03:05,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852899412] [2020-11-22 13:03:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:03:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:03:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:03:05,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852899412] [2020-11-22 13:03:05,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:03:05,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:03:05,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122781087] [2020-11-22 13:03:05,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:03:05,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:03:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:03:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:03:05,041 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-11-22 13:03:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:03:05,062 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-11-22 13:03:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:03:05,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-22 13:03:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:03:05,063 INFO L225 Difference]: With dead ends: 27 [2020-11-22 13:03:05,063 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:03:05,064 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 [2020-11-22 13:03:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:03:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:03:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:03:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:03:05,064 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-22 13:03:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:03:05,065 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:03:05,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:03:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:03:05,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:03:05,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:03:05,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:03:05,082 INFO L274 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L274 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-11-22 13:03:05,083 INFO L277 CegarLoopResult]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L146(line 146) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,084 INFO L277 CegarLoopResult]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-11-22 13:03:05,084 INFO L277 CegarLoopResult]: At program point L164(lines 6 165) the Hoare annotation is: true [2020-11-22 13:03:05,084 INFO L274 CegarLoopResult]: For program point L131(line 131) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L270 CegarLoopResult]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-11-22 13:03:05,085 INFO L274 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-11-22 13:03:05,086 INFO L274 CegarLoopResult]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,086 INFO L274 CegarLoopResult]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-11-22 13:03:05,086 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-11-22 13:03:05,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:03:05 BoogieIcfgContainer [2020-11-22 13:03:05,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:03:05,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:03:05,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:03:05,095 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:03:05,096 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:03:03" (3/4) ... [2020-11-22 13:03:05,098 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:03:05,112 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-22 13:03:05,113 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 13:03:05,113 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 13:03:05,114 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:03:05,182 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_509f25f9-d8d0-469b-9fe1-f5ae8ab6431f/bin/utaipan/witness.graphml [2020-11-22 13:03:05,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:03:05,184 INFO L168 Benchmark]: Toolchain (without parser) took 2674.48 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.5 MB in the beginning and 72.4 MB in the end (delta: 7.1 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,185 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 75.5 MB. Free memory was 35.5 MB in the beginning and 35.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:05,185 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.43 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 86.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.10 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,186 INFO L168 Benchmark]: Boogie Preprocessor took 24.53 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 83.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,187 INFO L168 Benchmark]: RCFGBuilder took 708.60 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 43.9 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,187 INFO L168 Benchmark]: TraceAbstraction took 1470.41 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 43.3 MB in the beginning and 76.7 MB in the end (delta: -33.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:03:05,188 INFO L168 Benchmark]: Witness Printer took 87.65 ms. Allocated memory is still 134.2 MB. Free memory was 76.7 MB in the beginning and 72.4 MB in the end (delta: 4.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:03:05,190 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 75.5 MB. Free memory was 35.5 MB in the beginning and 35.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.43 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 86.6 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 36.10 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.53 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 83.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 708.60 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 43.9 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1470.41 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 43.3 MB in the beginning and 76.7 MB in the end (delta: -33.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 87.65 ms. Allocated memory is still 134.2 MB. Free memory was 76.7 MB in the beginning and 72.4 MB in the end (delta: 4.3 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: 41]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 312 SDslu, 539 SDs, 0 SdLazy, 90 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 126 StatesRemovedByMinimization, 9 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, 0.4s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 4805 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...