./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.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_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c -s /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/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 a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:45:55,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:45:55,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:45:55,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:45:55,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:45:55,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:45:55,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:45:56,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:45:56,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:45:56,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:45:56,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:45:56,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:45:56,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:45:56,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:45:56,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:45:56,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:45:56,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:45:56,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:45:56,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:45:56,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:45:56,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:45:56,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:45:56,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:45:56,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:45:56,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:45:56,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:45:56,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:45:56,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:45:56,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:45:56,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:45:56,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:45:56,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:45:56,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:45:56,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:45:56,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:45:56,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:45:56,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:45:56,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:45:56,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:45:56,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:45:56,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:45:56,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 01:45:56,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:45:56,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:45:56,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:45:56,103 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:45:56,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:45:56,104 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:45:56,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:45:56,105 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:45:56,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:45:56,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:45:56,107 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:45:56,122 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:45:56,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:45:56,123 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:45:56,132 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:45:56,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:45:56,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:45:56,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:45:56,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:45:56,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:45:56,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:45:56,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:45:56,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:45:56,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:45:56,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:45:56,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:45:56,137 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:45:56,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:45:56,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:45:56,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:45:56,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:45:56,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:45:56,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:45:56,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:45:56,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:45:56,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:45:56,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:45:56,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:45:56,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:45:56,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:45:56,147 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_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a782d0524cc0b0b5c0b646ffcbe2ffba4b8b0177 [2020-11-30 01:45:56,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:45:56,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:45:56,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:45:56,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:45:56,530 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:45:56,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2020-11-30 01:45:56,610 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/data/6174f9c31/c86e2dd913f94f2197f47fbbb35c0ebb/FLAG3b18e8044 [2020-11-30 01:45:57,284 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:45:57,285 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/sv-benchmarks/c/eca-rers2012/Problem01_label04.c [2020-11-30 01:45:57,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/data/6174f9c31/c86e2dd913f94f2197f47fbbb35c0ebb/FLAG3b18e8044 [2020-11-30 01:45:57,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/data/6174f9c31/c86e2dd913f94f2197f47fbbb35c0ebb [2020-11-30 01:45:57,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:45:57,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:45:57,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:45:57,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:45:57,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:45:57,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:45:57" (1/1) ... [2020-11-30 01:45:57,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f4ff432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:57, skipping insertion in model container [2020-11-30 01:45:57,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:45:57" (1/1) ... [2020-11-30 01:45:57,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:45:57,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:45:58,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:45:58,056 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:45:58,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:45:58,201 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:45:58,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58 WrapperNode [2020-11-30 01:45:58,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:45:58,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:45:58,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:45:58,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:45:58,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:45:58,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:45:58,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:45:58,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:45:58,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... [2020-11-30 01:45:58,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:45:58,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:45:58,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:45:58,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:45:58,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/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 [2020-11-30 01:45:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:45:58,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:45:58,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:45:58,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:46:01,967 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:46:01,968 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:46:01,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:01 BoogieIcfgContainer [2020-11-30 01:46:01,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:46:01,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:46:01,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:46:01,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:46:01,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:45:57" (1/3) ... [2020-11-30 01:46:01,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30549a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:46:01, skipping insertion in model container [2020-11-30 01:46:01,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:45:58" (2/3) ... [2020-11-30 01:46:01,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30549a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:46:01, skipping insertion in model container [2020-11-30 01:46:01,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:01" (3/3) ... [2020-11-30 01:46:01,983 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label04.c [2020-11-30 01:46:02,000 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:46:02,005 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:46:02,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:46:02,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:46:02,046 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:46:02,046 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:46:02,046 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:46:02,047 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:46:02,047 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:46:02,047 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:46:02,047 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:46:02,066 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-30 01:46:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-30 01:46:02,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:02,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:02,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1520706413, now seen corresponding path program 1 times [2020-11-30 01:46:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:02,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629926007] [2020-11-30 01:46:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629926007] [2020-11-30 01:46:02,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:02,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:02,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158743814] [2020-11-30 01:46:02,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:02,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:02,646 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-30 01:46:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:03,482 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-30 01:46:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:03,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-30 01:46:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:03,499 INFO L225 Difference]: With dead ends: 224 [2020-11-30 01:46:03,500 INFO L226 Difference]: Without dead ends: 145 [2020-11-30 01:46:03,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-30 01:46:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-30 01:46:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-30 01:46:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-30 01:46:03,586 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-30 01:46:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:03,589 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-30 01:46:03,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-30 01:46:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-30 01:46:03,597 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:03,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:03,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:46:03,598 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1975139774, now seen corresponding path program 1 times [2020-11-30 01:46:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:03,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174017224] [2020-11-30 01:46:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:03,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174017224] [2020-11-30 01:46:03,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:03,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734396759] [2020-11-30 01:46:03,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:03,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:03,726 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-30 01:46:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:04,362 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-30 01:46:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:04,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-30 01:46:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:04,367 INFO L225 Difference]: With dead ends: 431 [2020-11-30 01:46:04,367 INFO L226 Difference]: Without dead ends: 287 [2020-11-30 01:46:04,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-30 01:46:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-30 01:46:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-30 01:46:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-11-30 01:46:04,407 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-11-30 01:46:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:04,407 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-11-30 01:46:04,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-11-30 01:46:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-30 01:46:04,413 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:04,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:04,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:46:04,414 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1832092356, now seen corresponding path program 1 times [2020-11-30 01:46:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:04,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427842347] [2020-11-30 01:46:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 01:46:04,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427842347] [2020-11-30 01:46:04,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:04,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:04,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622282289] [2020-11-30 01:46:04,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:04,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:04,620 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 3 states. [2020-11-30 01:46:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:05,110 INFO L93 Difference]: Finished difference Result 857 states and 1401 transitions. [2020-11-30 01:46:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:05,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-11-30 01:46:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:05,117 INFO L225 Difference]: With dead ends: 857 [2020-11-30 01:46:05,117 INFO L226 Difference]: Without dead ends: 571 [2020-11-30 01:46:05,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-30 01:46:05,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-30 01:46:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-30 01:46:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2020-11-30 01:46:05,160 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 78 [2020-11-30 01:46:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:05,161 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2020-11-30 01:46:05,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2020-11-30 01:46:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-30 01:46:05,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:05,179 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:05,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:46:05,180 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1345546674, now seen corresponding path program 1 times [2020-11-30 01:46:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:05,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230178078] [2020-11-30 01:46:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 01:46:05,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230178078] [2020-11-30 01:46:05,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:05,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:46:05,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498604250] [2020-11-30 01:46:05,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:05,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:05,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:05,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:05,302 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2020-11-30 01:46:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:05,891 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2020-11-30 01:46:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:05,893 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-11-30 01:46:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:05,902 INFO L225 Difference]: With dead ends: 1567 [2020-11-30 01:46:05,902 INFO L226 Difference]: Without dead ends: 997 [2020-11-30 01:46:05,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-30 01:46:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2020-11-30 01:46:05,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-30 01:46:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1045 transitions. [2020-11-30 01:46:05,960 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1045 transitions. Word has length 91 [2020-11-30 01:46:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:05,960 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1045 transitions. [2020-11-30 01:46:05,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1045 transitions. [2020-11-30 01:46:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-30 01:46:05,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:05,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:05,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:46:05,974 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1848427496, now seen corresponding path program 1 times [2020-11-30 01:46:05,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612796097] [2020-11-30 01:46:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:06,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612796097] [2020-11-30 01:46:06,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:06,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:46:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016114031] [2020-11-30 01:46:06,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:06,118 INFO L87 Difference]: Start difference. First operand 713 states and 1045 transitions. Second operand 3 states. [2020-11-30 01:46:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:06,737 INFO L93 Difference]: Finished difference Result 2135 states and 3132 transitions. [2020-11-30 01:46:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:06,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-11-30 01:46:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:06,749 INFO L225 Difference]: With dead ends: 2135 [2020-11-30 01:46:06,750 INFO L226 Difference]: Without dead ends: 1423 [2020-11-30 01:46:06,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-30 01:46:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1210. [2020-11-30 01:46:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-30 01:46:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1704 transitions. [2020-11-30 01:46:06,813 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1704 transitions. Word has length 94 [2020-11-30 01:46:06,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:06,817 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1704 transitions. [2020-11-30 01:46:06,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1704 transitions. [2020-11-30 01:46:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-30 01:46:06,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:06,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:06,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:46:06,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash -55057937, now seen corresponding path program 1 times [2020-11-30 01:46:06,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:06,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408689671] [2020-11-30 01:46:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:46:06,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408689671] [2020-11-30 01:46:06,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:06,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:46:06,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028067158] [2020-11-30 01:46:06,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:46:06,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:46:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:46:06,951 INFO L87 Difference]: Start difference. First operand 1210 states and 1704 transitions. Second operand 4 states. [2020-11-30 01:46:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:07,740 INFO L93 Difference]: Finished difference Result 2632 states and 3644 transitions. [2020-11-30 01:46:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:46:07,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-30 01:46:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:07,757 INFO L225 Difference]: With dead ends: 2632 [2020-11-30 01:46:07,758 INFO L226 Difference]: Without dead ends: 1494 [2020-11-30 01:46:07,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:46:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-30 01:46:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-11-30 01:46:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-30 01:46:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1769 transitions. [2020-11-30 01:46:07,810 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1769 transitions. Word has length 97 [2020-11-30 01:46:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:07,810 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1769 transitions. [2020-11-30 01:46:07,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:46:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1769 transitions. [2020-11-30 01:46:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-30 01:46:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:07,825 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:07,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 01:46:07,825 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash 114928910, now seen corresponding path program 1 times [2020-11-30 01:46:07,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:07,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256793908] [2020-11-30 01:46:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 01:46:07,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256793908] [2020-11-30 01:46:07,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:07,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:07,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088358797] [2020-11-30 01:46:07,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:07,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:07,903 INFO L87 Difference]: Start difference. First operand 1281 states and 1769 transitions. Second operand 3 states. [2020-11-30 01:46:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:08,422 INFO L93 Difference]: Finished difference Result 2632 states and 3608 transitions. [2020-11-30 01:46:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:08,423 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-11-30 01:46:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:08,432 INFO L225 Difference]: With dead ends: 2632 [2020-11-30 01:46:08,433 INFO L226 Difference]: Without dead ends: 1281 [2020-11-30 01:46:08,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-30 01:46:08,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-30 01:46:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-30 01:46:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1556 transitions. [2020-11-30 01:46:08,479 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1556 transitions. Word has length 98 [2020-11-30 01:46:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:08,480 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1556 transitions. [2020-11-30 01:46:08,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1556 transitions. [2020-11-30 01:46:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-30 01:46:08,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:08,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:08,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 01:46:08,485 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:08,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1447503252, now seen corresponding path program 1 times [2020-11-30 01:46:08,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:08,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528422416] [2020-11-30 01:46:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-30 01:46:08,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528422416] [2020-11-30 01:46:08,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:08,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:08,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588694611] [2020-11-30 01:46:08,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:08,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:08,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:08,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:08,586 INFO L87 Difference]: Start difference. First operand 1281 states and 1556 transitions. Second operand 3 states. [2020-11-30 01:46:09,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:09,023 INFO L93 Difference]: Finished difference Result 2490 states and 3033 transitions. [2020-11-30 01:46:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:09,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-11-30 01:46:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:09,033 INFO L225 Difference]: With dead ends: 2490 [2020-11-30 01:46:09,033 INFO L226 Difference]: Without dead ends: 1281 [2020-11-30 01:46:09,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-30 01:46:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-30 01:46:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-30 01:46:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1513 transitions. [2020-11-30 01:46:09,081 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1513 transitions. Word has length 102 [2020-11-30 01:46:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:09,081 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1513 transitions. [2020-11-30 01:46:09,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1513 transitions. [2020-11-30 01:46:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-30 01:46:09,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:09,086 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:09,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 01:46:09,089 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:09,090 INFO L82 PathProgramCache]: Analyzing trace with hash 554915518, now seen corresponding path program 1 times [2020-11-30 01:46:09,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:09,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362613247] [2020-11-30 01:46:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-30 01:46:09,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362613247] [2020-11-30 01:46:09,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:09,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:46:09,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430047364] [2020-11-30 01:46:09,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:09,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:09,177 INFO L87 Difference]: Start difference. First operand 1281 states and 1513 transitions. Second operand 3 states. [2020-11-30 01:46:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:09,607 INFO L93 Difference]: Finished difference Result 2916 states and 3483 transitions. [2020-11-30 01:46:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:09,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-11-30 01:46:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:09,620 INFO L225 Difference]: With dead ends: 2916 [2020-11-30 01:46:09,621 INFO L226 Difference]: Without dead ends: 1707 [2020-11-30 01:46:09,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-30 01:46:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2020-11-30 01:46:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-11-30 01:46:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1964 transitions. [2020-11-30 01:46:09,715 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1964 transitions. Word has length 111 [2020-11-30 01:46:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:09,715 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1964 transitions. [2020-11-30 01:46:09,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1964 transitions. [2020-11-30 01:46:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-30 01:46:09,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:09,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:09,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 01:46:09,725 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash 310663761, now seen corresponding path program 1 times [2020-11-30 01:46:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:09,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941416093] [2020-11-30 01:46:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-30 01:46:09,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941416093] [2020-11-30 01:46:09,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:09,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:46:09,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364340002] [2020-11-30 01:46:09,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:09,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:09,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:09,844 INFO L87 Difference]: Start difference. First operand 1636 states and 1964 transitions. Second operand 3 states. [2020-11-30 01:46:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:10,237 INFO L93 Difference]: Finished difference Result 3271 states and 3929 transitions. [2020-11-30 01:46:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:10,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-11-30 01:46:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:10,249 INFO L225 Difference]: With dead ends: 3271 [2020-11-30 01:46:10,249 INFO L226 Difference]: Without dead ends: 1707 [2020-11-30 01:46:10,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:46:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-30 01:46:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2020-11-30 01:46:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-11-30 01:46:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1954 transitions. [2020-11-30 01:46:10,307 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1954 transitions. Word has length 130 [2020-11-30 01:46:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:10,308 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1954 transitions. [2020-11-30 01:46:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1954 transitions. [2020-11-30 01:46:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-11-30 01:46:10,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:10,314 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:10,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 01:46:10,315 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181061, now seen corresponding path program 1 times [2020-11-30 01:46:10,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:10,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977237693] [2020-11-30 01:46:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-11-30 01:46:10,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977237693] [2020-11-30 01:46:10,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:46:10,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:46:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574080899] [2020-11-30 01:46:10,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:46:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:10,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:46:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:46:10,496 INFO L87 Difference]: Start difference. First operand 1636 states and 1954 transitions. Second operand 4 states. [2020-11-30 01:46:11,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:11,101 INFO L93 Difference]: Finished difference Result 3342 states and 3999 transitions. [2020-11-30 01:46:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:46:11,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-11-30 01:46:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:11,114 INFO L225 Difference]: With dead ends: 3342 [2020-11-30 01:46:11,114 INFO L226 Difference]: Without dead ends: 1778 [2020-11-30 01:46:11,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:46:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-30 01:46:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1636. [2020-11-30 01:46:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-11-30 01:46:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1934 transitions. [2020-11-30 01:46:11,171 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1934 transitions. Word has length 146 [2020-11-30 01:46:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:11,172 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1934 transitions. [2020-11-30 01:46:11,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:46:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1934 transitions. [2020-11-30 01:46:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-30 01:46:11,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:11,178 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:11,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 01:46:11,178 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1597333074, now seen corresponding path program 1 times [2020-11-30 01:46:11,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:11,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901363328] [2020-11-30 01:46:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 125 proven. 11 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-11-30 01:46:11,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901363328] [2020-11-30 01:46:11,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129482151] [2020-11-30 01:46:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:11,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:46:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-30 01:46:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-30 01:46:11,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:46:11,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-30 01:46:11,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703682561] [2020-11-30 01:46:11,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:46:11,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:46:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:46:11,922 INFO L87 Difference]: Start difference. First operand 1636 states and 1934 transitions. Second operand 4 states. [2020-11-30 01:46:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:12,564 INFO L93 Difference]: Finished difference Result 3626 states and 4331 transitions. [2020-11-30 01:46:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:46:12,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-11-30 01:46:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:12,579 INFO L225 Difference]: With dead ends: 3626 [2020-11-30 01:46:12,579 INFO L226 Difference]: Without dead ends: 2062 [2020-11-30 01:46:12,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:46:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2020-11-30 01:46:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1565. [2020-11-30 01:46:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-11-30 01:46:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1810 transitions. [2020-11-30 01:46:12,638 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1810 transitions. Word has length 163 [2020-11-30 01:46:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:12,639 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1810 transitions. [2020-11-30 01:46:12,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:46:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1810 transitions. [2020-11-30 01:46:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-30 01:46:12,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:12,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:12,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 01:46:12,863 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1329519720, now seen corresponding path program 1 times [2020-11-30 01:46:12,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:12,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971294596] [2020-11-30 01:46:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 158 proven. 11 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-11-30 01:46:13,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971294596] [2020-11-30 01:46:13,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153735322] [2020-11-30 01:46:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:46:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:46:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-30 01:46:13,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:46:13,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-30 01:46:13,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788448115] [2020-11-30 01:46:13,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:46:13,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:46:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:46:13,480 INFO L87 Difference]: Start difference. First operand 1565 states and 1810 transitions. Second operand 3 states. [2020-11-30 01:46:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:13,923 INFO L93 Difference]: Finished difference Result 1780 states and 2069 transitions. [2020-11-30 01:46:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:46:13,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2020-11-30 01:46:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:13,937 INFO L225 Difference]: With dead ends: 1780 [2020-11-30 01:46:13,937 INFO L226 Difference]: Without dead ends: 1778 [2020-11-30 01:46:13,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:46:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-30 01:46:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1707. [2020-11-30 01:46:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-11-30 01:46:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 1987 transitions. [2020-11-30 01:46:14,005 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 1987 transitions. Word has length 196 [2020-11-30 01:46:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:14,005 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 1987 transitions. [2020-11-30 01:46:14,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:46:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 1987 transitions. [2020-11-30 01:46:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-11-30 01:46:14,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:46:14,014 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:46:14,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-30 01:46:14,227 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:46:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:46:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1280070069, now seen corresponding path program 1 times [2020-11-30 01:46:14,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:46:14,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302623948] [2020-11-30 01:46:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:46:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 189 proven. 11 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-11-30 01:46:14,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302623948] [2020-11-30 01:46:14,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431228537] [2020-11-30 01:46:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:46:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:46:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:46:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:46:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-11-30 01:46:14,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:46:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-11-30 01:46:14,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 01:46:14,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-11-30 01:46:14,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553005034] [2020-11-30 01:46:14,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:46:14,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:46:14,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:46:14,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:46:14,841 INFO L87 Difference]: Start difference. First operand 1707 states and 1987 transitions. Second operand 4 states. [2020-11-30 01:46:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:46:15,660 INFO L93 Difference]: Finished difference Result 3340 states and 3886 transitions. [2020-11-30 01:46:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:46:15,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2020-11-30 01:46:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:46:15,662 INFO L225 Difference]: With dead ends: 3340 [2020-11-30 01:46:15,662 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:46:15,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:46:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:46:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:46:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:46:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:46:15,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 221 [2020-11-30 01:46:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:46:15,667 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:46:15,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:46:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:46:15,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:46:15,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-30 01:46:15,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:46:16,248 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-11-30 01:46:16,516 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-30 01:46:16,520 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L470-1(lines 40 585) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-30 01:46:16,521 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L473-1(lines 40 585) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L474(line 474) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-30 01:46:16,522 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-30 01:46:16,523 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-30 01:46:16,524 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-30 01:46:16,525 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2020-11-30 01:46:16,525 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-30 01:46:16,525 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-30 01:46:16,525 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-30 01:46:16,525 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-30 01:46:16,525 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-30 01:46:16,526 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-30 01:46:16,527 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-30 01:46:16,527 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-30 01:46:16,527 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-30 01:46:16,533 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-30 01:46:16,534 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-30 01:46:16,535 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (<= ~a8~0 13)) (.cse0 (<= ~a16~0 4)) (.cse7 (= ~a20~0 1)) (.cse11 (= ~a17~0 1))) (let ((.cse5 (<= 15 ~a8~0)) (.cse4 (= ~a21~0 1)) (.cse6 (let ((.cse12 (<= ~a7~0 0))) (or (and .cse12 .cse2) (and .cse0 .cse12 .cse7 .cse11)))) (.cse1 (<= ~a21~0 0)) (.cse9 (< 13 ~a8~0)) (.cse10 (<= ~a16~0 5)) (.cse3 (not .cse11)) (.cse8 (not .cse7))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse2) (and .cse4 .cse5) (and .cse4 .cse6 .cse7) (and .cse3 .cse8 .cse5) (and .cse0 .cse7 .cse2) (and .cse4 .cse9 .cse10 .cse7) (and .cse10 .cse3 .cse6 .cse8) (and .cse1 .cse7 .cse2) (and .cse9 .cse10 .cse3 .cse8)))) [2020-11-30 01:46:16,535 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-30 01:46:16,537 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 01:46:16,537 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-30 01:46:16,538 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-30 01:46:16,538 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-30 01:46:16,538 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-30 01:46:16,538 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-30 01:46:16,538 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-30 01:46:16,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:46:16 BoogieIcfgContainer [2020-11-30 01:46:16,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:46:16,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:46:16,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:46:16,603 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:46:16,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:46:01" (3/4) ... [2020-11-30 01:46:16,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:46:16,650 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-30 01:46:16,652 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 01:46:16,654 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 01:46:16,657 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 01:46:16,866 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_037fd7a2-8cec-4b8c-92a2-18c067ccf18d/bin/utaipan/witness.graphml [2020-11-30 01:46:16,866 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:46:16,868 INFO L168 Benchmark]: Toolchain (without parser) took 19378.30 ms. Allocated memory was 94.4 MB in the beginning and 331.4 MB in the end (delta: 237.0 MB). Free memory was 73.8 MB in the beginning and 158.9 MB in the end (delta: -85.1 MB). Peak memory consumption was 152.0 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,868 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 77.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:46:16,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 711.80 ms. Allocated memory is still 94.4 MB. Free memory was 73.5 MB in the beginning and 46.8 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 172.46 ms. Allocated memory is still 94.4 MB. Free memory was 46.8 MB in the beginning and 41.1 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,870 INFO L168 Benchmark]: Boogie Preprocessor took 160.85 ms. Allocated memory is still 94.4 MB. Free memory was 41.1 MB in the beginning and 68.8 MB in the end (delta: -27.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,870 INFO L168 Benchmark]: RCFGBuilder took 3432.32 ms. Allocated memory was 94.4 MB in the beginning and 132.1 MB in the end (delta: 37.7 MB). Free memory was 68.8 MB in the beginning and 84.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,871 INFO L168 Benchmark]: TraceAbstraction took 14629.16 ms. Allocated memory was 132.1 MB in the beginning and 331.4 MB in the end (delta: 199.2 MB). Free memory was 83.3 MB in the beginning and 174.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 106.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,871 INFO L168 Benchmark]: Witness Printer took 263.67 ms. Allocated memory is still 331.4 MB. Free memory was 174.7 MB in the beginning and 158.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:46:16,874 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 77.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 711.80 ms. Allocated memory is still 94.4 MB. Free memory was 73.5 MB in the beginning and 46.8 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 172.46 ms. Allocated memory is still 94.4 MB. Free memory was 46.8 MB in the beginning and 41.1 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 160.85 ms. Allocated memory is still 94.4 MB. Free memory was 41.1 MB in the beginning and 68.8 MB in the end (delta: -27.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3432.32 ms. Allocated memory was 94.4 MB in the beginning and 132.1 MB in the end (delta: 37.7 MB). Free memory was 68.8 MB in the beginning and 84.3 MB in the end (delta: -15.5 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14629.16 ms. Allocated memory was 132.1 MB in the beginning and 331.4 MB in the end (delta: 199.2 MB). Free memory was 83.3 MB in the beginning and 174.7 MB in the end (delta: -91.4 MB). Peak memory consumption was 106.8 MB. Max. memory is 16.1 GB. * Witness Printer took 263.67 ms. Allocated memory is still 331.4 MB. Free memory was 174.7 MB in the beginning and 158.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 4 && a21 <= 0) && a8 <= 13) || ((a16 <= 4 && !(a17 == 1)) && a8 <= 13)) || (a21 == 1 && 15 <= a8)) || ((a21 == 1 && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && a20 == 1)) || ((!(a17 == 1) && !(a20 == 1)) && 15 <= a8)) || ((a16 <= 4 && a20 == 1) && a8 <= 13)) || (((a21 == 1 && 13 < a8) && a16 <= 5) && a20 == 1)) || (((a16 <= 5 && !(a17 == 1)) && ((a7 <= 0 && a8 <= 13) || (((a16 <= 4 && a7 <= 0) && a20 == 1) && a17 == 1))) && !(a20 == 1))) || ((a21 <= 0 && a20 == 1) && a8 <= 13)) || (((13 < a8 && a16 <= 5) && !(a17 == 1)) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.8s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 700 SDtfs, 997 SDslu, 67 SDs, 0 SdLazy, 3275 SolverSat, 735 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1193 GetRequests, 1168 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1707occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 14 MinimizatonAttempts, 1562 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 57 NumberOfFragments, 301 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3674 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 156 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 2255 NumberOfCodeBlocks, 2255 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 2815 ConstructedInterpolants, 0 QuantifiedInterpolants, 1015526 SizeOfPredicates, 5 NumberOfNonLiveVariables, 1378 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 2813/2846 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...