./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.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_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:56:51,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:56:51,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:56:51,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:56:51,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:56:51,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:56:51,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:56:51,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:56:51,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:56:51,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:56:51,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:56:51,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:56:51,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:56:51,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:56:51,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:56:51,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:56:51,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:56:51,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:56:51,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:56:51,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:56:51,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:56:51,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:56:51,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:56:51,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:56:51,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:56:51,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:56:51,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:56:51,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:56:51,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:56:51,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:56:51,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:56:51,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:56:51,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:56:51,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:56:51,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:56:51,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:56:51,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:56:51,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:56:51,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:56:51,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:56:51,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:56:51,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:56:51,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:56:51,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:56:51,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:56:51,362 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:56:51,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:56:51,363 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:56:51,363 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:56:51,363 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:56:51,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:56:51,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:56:51,365 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:56:51,366 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:56:51,366 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:56:51,366 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:56:51,367 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:56:51,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:56:51,368 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:56:51,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:56:51,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:56:51,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:56:51,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:56:51,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:56:51,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:56:51,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:56:51,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:56:51,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:56:51,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:56:51,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:56:51,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:56:51,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:56:51,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:56:51,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:56:51,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:56:51,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:56:51,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:56:51,376 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:56:51,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:56:51,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:56:51,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:56:51,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:56:51,377 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_dd2c7c64-af15-47bf-8a71-6e17d683987d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 [2020-11-30 02:56:51,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:56:51,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:56:51,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:56:51,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:56:51,760 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:56:51,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:56:51,882 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/2cdf3d86c/9aa9b0a4dfde4e9098da6655c87e5514/FLAG3cc9f15fa [2020-11-30 02:56:52,641 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:56:52,642 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:56:52,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/2cdf3d86c/9aa9b0a4dfde4e9098da6655c87e5514/FLAG3cc9f15fa [2020-11-30 02:56:52,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/2cdf3d86c/9aa9b0a4dfde4e9098da6655c87e5514 [2020-11-30 02:56:52,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:56:52,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:56:52,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:56:52,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:56:52,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:56:52,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:56:52" (1/1) ... [2020-11-30 02:56:52,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a4b7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:52, skipping insertion in model container [2020-11-30 02:56:52,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:56:52" (1/1) ... [2020-11-30 02:56:52,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:56:53,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:56:53,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:56:53,447 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:56:53,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:56:53,525 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:56:53,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53 WrapperNode [2020-11-30 02:56:53,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:56:53,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:56:53,534 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:56:53,534 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:56:53,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:56:53,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:56:53,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:56:53,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:56:53,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... [2020-11-30 02:56:53,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:56:53,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:56:53,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:56:53,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:56:53,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 02:56:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:56:53,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:56:53,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:56:53,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:56:54,043 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-30 02:56:54,826 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-11-30 02:56:54,826 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-11-30 02:56:55,479 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:56:55,479 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:56:55,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:56:55 BoogieIcfgContainer [2020-11-30 02:56:55,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:56:55,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:56:55,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:56:55,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:56:55,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:56:52" (1/3) ... [2020-11-30 02:56:55,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e2b8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:56:55, skipping insertion in model container [2020-11-30 02:56:55,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:56:53" (2/3) ... [2020-11-30 02:56:55,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e2b8c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:56:55, skipping insertion in model container [2020-11-30 02:56:55,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:56:55" (3/3) ... [2020-11-30 02:56:55,495 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:56:55,510 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:56:55,516 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:56:55,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:56:55,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:56:55,579 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:56:55,580 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:56:55,580 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:56:55,580 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:56:55,580 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:56:55,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:56:55,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:56:55,605 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-11-30 02:56:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:56:55,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:55,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:56:55,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash 120765708, now seen corresponding path program 1 times [2020-11-30 02:56:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427147893] [2020-11-30 02:56:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:55,833 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 02:56:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427147893] [2020-11-30 02:56:55,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:56:55,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:56:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081952385] [2020-11-30 02:56:55,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:56:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:56:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:56:55,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:56:55,859 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 3 states. [2020-11-30 02:56:56,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:56:56,148 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2020-11-30 02:56:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:56:56,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-30 02:56:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:56:56,164 INFO L225 Difference]: With dead ends: 169 [2020-11-30 02:56:56,164 INFO L226 Difference]: Without dead ends: 83 [2020-11-30 02:56:56,168 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 02:56:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-30 02:56:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-30 02:56:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-30 02:56:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2020-11-30 02:56:56,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2020-11-30 02:56:56,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:56:56,217 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2020-11-30 02:56:56,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:56:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2020-11-30 02:56:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:56:56,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:56,219 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-30 02:56:56,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:56:56,220 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1696403755, now seen corresponding path program 1 times [2020-11-30 02:56:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:56,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542676599] [2020-11-30 02:56:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:56:56,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542676599] [2020-11-30 02:56:56,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:56:56,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:56:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428882773] [2020-11-30 02:56:56,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:56:56,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:56:56,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:56:56,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:56:56,369 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand 3 states. [2020-11-30 02:56:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:56:56,617 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2020-11-30 02:56:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:56:56,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-30 02:56:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:56:56,620 INFO L225 Difference]: With dead ends: 178 [2020-11-30 02:56:56,620 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 02:56:56,622 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 02:56:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 02:56:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-11-30 02:56:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-30 02:56:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2020-11-30 02:56:56,642 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2020-11-30 02:56:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:56:56,643 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2020-11-30 02:56:56,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:56:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2020-11-30 02:56:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 02:56:56,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:56,646 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-11-30 02:56:56,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:56:56,646 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2016471423, now seen corresponding path program 1 times [2020-11-30 02:56:56,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:56,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514612101] [2020-11-30 02:56:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:56:56,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514612101] [2020-11-30 02:56:56,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:56:56,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:56:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747997610] [2020-11-30 02:56:56,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:56:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:56:56,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:56:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:56:56,754 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand 3 states. [2020-11-30 02:56:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:56:56,993 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2020-11-30 02:56:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:56:56,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-30 02:56:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:56:56,996 INFO L225 Difference]: With dead ends: 206 [2020-11-30 02:56:56,997 INFO L226 Difference]: Without dead ends: 113 [2020-11-30 02:56:56,998 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 02:56:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-30 02:56:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-11-30 02:56:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-30 02:56:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2020-11-30 02:56:57,013 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2020-11-30 02:56:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:56:57,016 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2020-11-30 02:56:57,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:56:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2020-11-30 02:56:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 02:56:57,019 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:57,020 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2020-11-30 02:56:57,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:56:57,021 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2018116219, now seen corresponding path program 1 times [2020-11-30 02:56:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:57,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478607462] [2020-11-30 02:56:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:56:57,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478607462] [2020-11-30 02:56:57,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025729224] [2020-11-30 02:56:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 02:56:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:56:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:56:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 02:56:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:56:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 02:56:57,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:56:57,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-11-30 02:56:57,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742258626] [2020-11-30 02:56:57,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:56:57,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:56:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:56:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:56:57,544 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand 6 states. [2020-11-30 02:56:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:56:58,227 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2020-11-30 02:56:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:56:58,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-11-30 02:56:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:56:58,231 INFO L225 Difference]: With dead ends: 312 [2020-11-30 02:56:58,231 INFO L226 Difference]: Without dead ends: 203 [2020-11-30 02:56:58,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:56:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-30 02:56:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2020-11-30 02:56:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-30 02:56:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2020-11-30 02:56:58,261 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2020-11-30 02:56:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:56:58,261 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2020-11-30 02:56:58,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:56:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2020-11-30 02:56:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-30 02:56:58,265 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:58,265 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 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] [2020-11-30 02:56:58,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:56:58,494 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1375532096, now seen corresponding path program 1 times [2020-11-30 02:56:58,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:58,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634491643] [2020-11-30 02:56:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-30 02:56:58,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634491643] [2020-11-30 02:56:58,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:56:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:56:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135941808] [2020-11-30 02:56:58,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:56:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:56:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:56:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:56:58,575 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand 3 states. [2020-11-30 02:56:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:56:58,796 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2020-11-30 02:56:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:56:58,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-11-30 02:56:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:56:58,799 INFO L225 Difference]: With dead ends: 390 [2020-11-30 02:56:58,800 INFO L226 Difference]: Without dead ends: 207 [2020-11-30 02:56:58,801 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 02:56:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-30 02:56:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-11-30 02:56:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-11-30 02:56:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2020-11-30 02:56:58,815 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2020-11-30 02:56:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:56:58,816 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2020-11-30 02:56:58,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:56:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2020-11-30 02:56:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-30 02:56:58,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:56:58,821 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-11-30 02:56:58,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:56:58,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:56:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:56:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1967083701, now seen corresponding path program 1 times [2020-11-30 02:56:58,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:56:58,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049346809] [2020-11-30 02:56:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:56:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 02:56:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049346809] [2020-11-30 02:56:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446347788] [2020-11-30 02:56:58,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 02:56:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:56:59,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:56:59,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:56:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-30 02:56:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:56:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-30 02:56:59,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442707345] [2020-11-30 02:56:59,325 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2020-11-30 02:56:59,325 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:56:59,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:56:59,353 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:56:59,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:56:59,986 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-11-30 02:57:00,338 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-11-30 02:57:00,636 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-11-30 02:57:01,188 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 185 [2020-11-30 02:57:01,338 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-11-30 02:57:02,142 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:57:02,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:57:02,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 7 [2020-11-30 02:57:02,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17531515] [2020-11-30 02:57:02,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:57:02,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:57:02,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:57:02,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:57:02,148 INFO L87 Difference]: Start difference. First operand 205 states and 277 transitions. Second operand 8 states. [2020-11-30 02:57:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:02,259 INFO L93 Difference]: Finished difference Result 649 states and 873 transitions. [2020-11-30 02:57:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:57:02,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-11-30 02:57:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:02,265 INFO L225 Difference]: With dead ends: 649 [2020-11-30 02:57:02,265 INFO L226 Difference]: Without dead ends: 647 [2020-11-30 02:57:02,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:57:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2020-11-30 02:57:02,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 566. [2020-11-30 02:57:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-30 02:57:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 775 transitions. [2020-11-30 02:57:02,315 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 775 transitions. Word has length 85 [2020-11-30 02:57:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:02,316 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 775 transitions. [2020-11-30 02:57:02,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:57:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 775 transitions. [2020-11-30 02:57:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-11-30 02:57:02,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:02,333 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2020-11-30 02:57:02,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:57:02,534 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 219023449, now seen corresponding path program 1 times [2020-11-30 02:57:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:57:02,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124528146] [2020-11-30 02:57:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:57:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-30 02:57:02,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124528146] [2020-11-30 02:57:02,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:02,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:57:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799949736] [2020-11-30 02:57:02,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:57:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:02,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:02,686 INFO L87 Difference]: Start difference. First operand 566 states and 775 transitions. Second operand 3 states. [2020-11-30 02:57:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:03,027 INFO L93 Difference]: Finished difference Result 1260 states and 1782 transitions. [2020-11-30 02:57:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:03,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2020-11-30 02:57:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:03,033 INFO L225 Difference]: With dead ends: 1260 [2020-11-30 02:57:03,033 INFO L226 Difference]: Without dead ends: 694 [2020-11-30 02:57:03,035 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 02:57:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-11-30 02:57:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 629. [2020-11-30 02:57:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 629 states. [2020-11-30 02:57:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 859 transitions. [2020-11-30 02:57:03,062 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 859 transitions. Word has length 143 [2020-11-30 02:57:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:03,064 INFO L481 AbstractCegarLoop]: Abstraction has 629 states and 859 transitions. [2020-11-30 02:57:03,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 859 transitions. [2020-11-30 02:57:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-30 02:57:03,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:03,068 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2020-11-30 02:57:03,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-30 02:57:03,069 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1063587098, now seen corresponding path program 2 times [2020-11-30 02:57:03,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:57:03,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476509777] [2020-11-30 02:57:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:57:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 282 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-30 02:57:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476509777] [2020-11-30 02:57:03,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:03,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:57:03,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085795232] [2020-11-30 02:57:03,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:03,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:57:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:03,223 INFO L87 Difference]: Start difference. First operand 629 states and 859 transitions. Second operand 3 states. [2020-11-30 02:57:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:03,525 INFO L93 Difference]: Finished difference Result 1447 states and 2059 transitions. [2020-11-30 02:57:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:03,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2020-11-30 02:57:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:03,534 INFO L225 Difference]: With dead ends: 1447 [2020-11-30 02:57:03,534 INFO L226 Difference]: Without dead ends: 770 [2020-11-30 02:57:03,535 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 02:57:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-11-30 02:57:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 743. [2020-11-30 02:57:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-11-30 02:57:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1003 transitions. [2020-11-30 02:57:03,566 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1003 transitions. Word has length 152 [2020-11-30 02:57:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:03,567 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1003 transitions. [2020-11-30 02:57:03,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1003 transitions. [2020-11-30 02:57:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-30 02:57:03,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:03,576 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2020-11-30 02:57:03,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-30 02:57:03,577 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1578002794, now seen corresponding path program 1 times [2020-11-30 02:57:03,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:57:03,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975474979] [2020-11-30 02:57:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:57:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-30 02:57:03,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975474979] [2020-11-30 02:57:03,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:57:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894021337] [2020-11-30 02:57:03,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:57:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:03,770 INFO L87 Difference]: Start difference. First operand 743 states and 1003 transitions. Second operand 3 states. [2020-11-30 02:57:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:03,829 INFO L93 Difference]: Finished difference Result 1225 states and 1656 transitions. [2020-11-30 02:57:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:03,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2020-11-30 02:57:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:03,835 INFO L225 Difference]: With dead ends: 1225 [2020-11-30 02:57:03,835 INFO L226 Difference]: Without dead ends: 743 [2020-11-30 02:57:03,837 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 02:57:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-11-30 02:57:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 743. [2020-11-30 02:57:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-11-30 02:57:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1001 transitions. [2020-11-30 02:57:03,869 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1001 transitions. Word has length 163 [2020-11-30 02:57:03,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:03,870 INFO L481 AbstractCegarLoop]: Abstraction has 743 states and 1001 transitions. [2020-11-30 02:57:03,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:03,870 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1001 transitions. [2020-11-30 02:57:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-30 02:57:03,873 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:03,874 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2020-11-30 02:57:03,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-30 02:57:03,874 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:03,875 INFO L82 PathProgramCache]: Analyzing trace with hash -18221924, now seen corresponding path program 1 times [2020-11-30 02:57:03,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:57:03,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125775039] [2020-11-30 02:57:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:57:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:57:03,961 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:57:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:57:04,041 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:57:04,171 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:57:04,171 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:57:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-30 02:57:04,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:57:04 BoogieIcfgContainer [2020-11-30 02:57:04,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:57:04,367 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:57:04,367 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:57:04,367 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:57:04,368 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:56:55" (3/4) ... [2020-11-30 02:57:04,372 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:57:04,372 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:57:04,373 INFO L168 Benchmark]: Toolchain (without parser) took 11404.85 ms. Allocated memory was 125.8 MB in the beginning and 257.9 MB in the end (delta: 132.1 MB). Free memory was 93.6 MB in the beginning and 181.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,374 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory was 43.0 MB in the beginning and 43.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:57:04,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 550.19 ms. Allocated memory is still 125.8 MB. Free memory was 93.4 MB in the beginning and 98.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,375 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.34 ms. Allocated memory is still 125.8 MB. Free memory was 98.7 MB in the beginning and 95.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,376 INFO L168 Benchmark]: Boogie Preprocessor took 67.35 ms. Allocated memory is still 125.8 MB. Free memory was 95.9 MB in the beginning and 94.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,377 INFO L168 Benchmark]: RCFGBuilder took 1752.88 ms. Allocated memory is still 125.8 MB. Free memory was 94.5 MB in the beginning and 64.4 MB in the end (delta: 30.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,377 INFO L168 Benchmark]: TraceAbstraction took 8880.57 ms. Allocated memory was 125.8 MB in the beginning and 257.9 MB in the end (delta: 132.1 MB). Free memory was 63.6 MB in the beginning and 181.3 MB in the end (delta: -117.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:04,378 INFO L168 Benchmark]: Witness Printer took 4.96 ms. Allocated memory is still 257.9 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:57:04,382 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory was 43.0 MB in the beginning and 43.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 550.19 ms. Allocated memory is still 125.8 MB. Free memory was 93.4 MB in the beginning and 98.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 116.34 ms. Allocated memory is still 125.8 MB. Free memory was 98.7 MB in the beginning and 95.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.35 ms. Allocated memory is still 125.8 MB. Free memory was 95.9 MB in the beginning and 94.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1752.88 ms. Allocated memory is still 125.8 MB. Free memory was 94.5 MB in the beginning and 64.4 MB in the end (delta: 30.1 MB). Peak memory consumption was 60.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8880.57 ms. Allocated memory was 125.8 MB in the beginning and 257.9 MB in the end (delta: 132.1 MB). Free memory was 63.6 MB in the beginning and 181.3 MB in the end (delta: -117.7 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.96 ms. Allocated memory is still 257.9 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseXor at line 357. Possible FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 ; [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate ; [L28] unsigned int s__ctx__stats__sess_connect ; [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags ; [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 ; [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND TRUE tmp___1 - 12288 [L86] COND FALSE !(tmp___2 - 16384) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L3] __assert_fail("0", "s3_clnt_2.BV.c.cil-2a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.5s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1223 SDtfs, 754 SDslu, 1097 SDs, 0 SdLazy, 894 SolverSat, 212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=743occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 196 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 1049 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1009 ConstructedInterpolants, 0 QuantifiedInterpolants, 315989 SizeOfPredicates, 4 NumberOfNonLiveVariables, 420 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 1708/1967 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:57:07,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:57:07,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:57:07,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:57:07,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:57:07,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:57:07,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:57:07,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:57:07,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:57:07,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:57:07,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:57:07,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:57:07,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:57:07,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:57:07,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:57:07,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:57:07,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:57:07,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:57:07,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:57:07,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:57:07,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:57:07,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:57:07,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:57:07,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:57:07,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:57:07,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:57:07,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:57:07,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:57:07,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:57:07,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:57:07,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:57:07,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:57:07,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:57:07,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:57:07,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:57:07,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:57:07,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:57:07,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:57:07,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:57:07,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:57:07,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:57:07,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 02:57:07,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:57:07,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:57:07,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:57:07,875 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:57:07,875 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:57:07,876 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:57:07,876 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:57:07,876 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:57:07,876 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:57:07,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:57:07,880 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:57:07,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:57:07,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:57:07,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:57:07,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:57:07,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:57:07,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:57:07,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:57:07,882 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:57:07,882 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:57:07,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:57:07,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:57:07,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:57:07,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:57:07,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:57:07,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:57:07,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:57:07,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:57:07,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:57:07,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:57:07,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:57:07,885 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:57:07,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:57:07,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:57:07,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:57:07,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:57:07,887 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_dd2c7c64-af15-47bf-8a71-6e17d683987d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6995ed6ba91d7bb4325b7b2cb6cc1ca7ba7d3a61 [2020-11-30 02:57:08,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:57:08,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:57:08,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:57:08,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:57:08,454 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:57:08,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:57:08,542 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/b65f788e2/301cfba6da854db686805506a817ad75/FLAG2918a154b [2020-11-30 02:57:09,279 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:57:09,282 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:57:09,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/b65f788e2/301cfba6da854db686805506a817ad75/FLAG2918a154b [2020-11-30 02:57:09,579 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/data/b65f788e2/301cfba6da854db686805506a817ad75 [2020-11-30 02:57:09,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:57:09,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:57:09,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:57:09,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:57:09,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:57:09,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:57:09" (1/1) ... [2020-11-30 02:57:09,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2019f288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:09, skipping insertion in model container [2020-11-30 02:57:09,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:57:09" (1/1) ... [2020-11-30 02:57:09,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:57:09,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:57:09,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:57:09,933 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:57:10,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:57:10,090 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:57:10,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10 WrapperNode [2020-11-30 02:57:10,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:57:10,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:57:10,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:57:10,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:57:10,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:57:10,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:57:10,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:57:10,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:57:10,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... [2020-11-30 02:57:10,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:57:10,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:57:10,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:57:10,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:57:10,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/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 02:57:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:57:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:57:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:57:10,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:57:10,541 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-30 02:57:11,689 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-11-30 02:57:11,691 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-11-30 02:57:11,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:57:11,708 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:57:11,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:57:11 BoogieIcfgContainer [2020-11-30 02:57:11,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:57:11,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:57:11,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:57:11,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:57:11,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:57:09" (1/3) ... [2020-11-30 02:57:11,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c30850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:57:11, skipping insertion in model container [2020-11-30 02:57:11,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:57:10" (2/3) ... [2020-11-30 02:57:11,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c30850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:57:11, skipping insertion in model container [2020-11-30 02:57:11,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:57:11" (3/3) ... [2020-11-30 02:57:11,727 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2020-11-30 02:57:11,740 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:57:11,747 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:57:11,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:57:11,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:57:11,793 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:57:11,793 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:57:11,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:57:11,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:57:11,794 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:57:11,794 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:57:11,794 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:57:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states. [2020-11-30 02:57:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 02:57:11,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:11,822 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] [2020-11-30 02:57:11,822 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2020-11-30 02:57:11,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:11,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39372786] [2020-11-30 02:57:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:12,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:12,172 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 02:57:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:12,198 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 02:57:12,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39372786] [2020-11-30 02:57:12,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:12,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498431345] [2020-11-30 02:57:12,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:12,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:12,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:12,233 INFO L87 Difference]: Start difference. First operand 126 states. Second operand 3 states. [2020-11-30 02:57:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:12,605 INFO L93 Difference]: Finished difference Result 247 states and 422 transitions. [2020-11-30 02:57:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:12,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-30 02:57:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:12,622 INFO L225 Difference]: With dead ends: 247 [2020-11-30 02:57:12,623 INFO L226 Difference]: Without dead ends: 112 [2020-11-30 02:57:12,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 02:57:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-30 02:57:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-11-30 02:57:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-30 02:57:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2020-11-30 02:57:12,690 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2020-11-30 02:57:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:12,691 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2020-11-30 02:57:12,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2020-11-30 02:57:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 02:57:12,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:12,695 INFO L422 BasicCegarLoop]: trace histogram [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 02:57:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:57:12,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2020-11-30 02:57:12,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:12,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978825669] [2020-11-30 02:57:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:13,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:57:13,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:57:13,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978825669] [2020-11-30 02:57:13,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:13,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18502413] [2020-11-30 02:57:13,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:13,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:13,089 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand 3 states. [2020-11-30 02:57:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:13,434 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2020-11-30 02:57:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:13,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-30 02:57:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:13,438 INFO L225 Difference]: With dead ends: 233 [2020-11-30 02:57:13,438 INFO L226 Difference]: Without dead ends: 131 [2020-11-30 02:57:13,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 02:57:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-30 02:57:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-11-30 02:57:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-30 02:57:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2020-11-30 02:57:13,454 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2020-11-30 02:57:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:13,458 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2020-11-30 02:57:13,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2020-11-30 02:57:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-30 02:57:13,463 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:13,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-11-30 02:57:13,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:57:13,684 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2020-11-30 02:57:13,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:13,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295073745] [2020-11-30 02:57:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 02:57:13,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-30 02:57:13,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295073745] [2020-11-30 02:57:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:13,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:13,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279201412] [2020-11-30 02:57:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:13,817 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand 3 states. [2020-11-30 02:57:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:14,022 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2020-11-30 02:57:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:14,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-11-30 02:57:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:14,024 INFO L225 Difference]: With dead ends: 265 [2020-11-30 02:57:14,024 INFO L226 Difference]: Without dead ends: 148 [2020-11-30 02:57:14,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 02:57:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-30 02:57:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-30 02:57:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-30 02:57:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2020-11-30 02:57:14,040 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2020-11-30 02:57:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:14,041 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2020-11-30 02:57:14,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2020-11-30 02:57:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-30 02:57:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:14,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-30 02:57:14,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:57:14,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2020-11-30 02:57:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:14,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187238538] [2020-11-30 02:57:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:14,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 02:57:14,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 02:57:14,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187238538] [2020-11-30 02:57:14,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:14,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:57:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45514477] [2020-11-30 02:57:14,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:57:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:57:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:57:14,448 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand 4 states. [2020-11-30 02:57:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:14,952 INFO L93 Difference]: Finished difference Result 349 states and 534 transitions. [2020-11-30 02:57:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:57:14,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-11-30 02:57:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:14,956 INFO L225 Difference]: With dead ends: 349 [2020-11-30 02:57:14,956 INFO L226 Difference]: Without dead ends: 215 [2020-11-30 02:57:14,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 02:57:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-11-30 02:57:14,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-11-30 02:57:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-11-30 02:57:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 297 transitions. [2020-11-30 02:57:14,981 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 297 transitions. Word has length 67 [2020-11-30 02:57:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:14,982 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 297 transitions. [2020-11-30 02:57:14,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:57:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 297 transitions. [2020-11-30 02:57:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-30 02:57:14,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:14,985 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-11-30 02:57:15,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 02:57:15,201 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:15,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1528022105, now seen corresponding path program 1 times [2020-11-30 02:57:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:15,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288575822] [2020-11-30 02:57:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 02:57:15,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-30 02:57:15,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288575822] [2020-11-30 02:57:15,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:15,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:15,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858136887] [2020-11-30 02:57:15,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:15,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:15,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:15,377 INFO L87 Difference]: Start difference. First operand 207 states and 297 transitions. Second operand 3 states. [2020-11-30 02:57:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:15,633 INFO L93 Difference]: Finished difference Result 427 states and 620 transitions. [2020-11-30 02:57:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:15,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-11-30 02:57:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:15,637 INFO L225 Difference]: With dead ends: 427 [2020-11-30 02:57:15,637 INFO L226 Difference]: Without dead ends: 230 [2020-11-30 02:57:15,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 02:57:15,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-11-30 02:57:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2020-11-30 02:57:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-11-30 02:57:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2020-11-30 02:57:15,670 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 68 [2020-11-30 02:57:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:15,671 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2020-11-30 02:57:15,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2020-11-30 02:57:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-30 02:57:15,696 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:15,696 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2020-11-30 02:57:15,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 02:57:15,898 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1678422895, now seen corresponding path program 1 times [2020-11-30 02:57:15,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:15,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562887800] [2020-11-30 02:57:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-30 02:57:16,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-30 02:57:16,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562887800] [2020-11-30 02:57:16,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:16,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656398653] [2020-11-30 02:57:16,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:16,073 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand 3 states. [2020-11-30 02:57:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:16,286 INFO L93 Difference]: Finished difference Result 466 states and 670 transitions. [2020-11-30 02:57:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:16,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-11-30 02:57:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:16,289 INFO L225 Difference]: With dead ends: 466 [2020-11-30 02:57:16,289 INFO L226 Difference]: Without dead ends: 250 [2020-11-30 02:57:16,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 02:57:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-30 02:57:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-11-30 02:57:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-11-30 02:57:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 347 transitions. [2020-11-30 02:57:16,319 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 347 transitions. Word has length 84 [2020-11-30 02:57:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:16,320 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 347 transitions. [2020-11-30 02:57:16,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 347 transitions. [2020-11-30 02:57:16,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-30 02:57:16,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:16,330 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-11-30 02:57:16,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-30 02:57:16,550 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2020-11-30 02:57:16,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:16,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463043460] [2020-11-30 02:57:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:16,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 02:57:16,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 02:57:16,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463043460] [2020-11-30 02:57:16,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:16,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:57:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820404667] [2020-11-30 02:57:16,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:57:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:16,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:57:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:57:16,738 INFO L87 Difference]: Start difference. First operand 247 states and 347 transitions. Second operand 4 states. [2020-11-30 02:57:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:16,816 INFO L93 Difference]: Finished difference Result 743 states and 1042 transitions. [2020-11-30 02:57:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:57:16,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-11-30 02:57:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:16,821 INFO L225 Difference]: With dead ends: 743 [2020-11-30 02:57:16,821 INFO L226 Difference]: Without dead ends: 506 [2020-11-30 02:57:16,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 202 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 02:57:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-11-30 02:57:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2020-11-30 02:57:16,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-11-30 02:57:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 702 transitions. [2020-11-30 02:57:16,843 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 702 transitions. Word has length 103 [2020-11-30 02:57:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:16,844 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 702 transitions. [2020-11-30 02:57:16,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:57:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 702 transitions. [2020-11-30 02:57:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-30 02:57:16,846 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:16,846 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-11-30 02:57:17,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 02:57:17,062 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash -847602632, now seen corresponding path program 1 times [2020-11-30 02:57:17,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:17,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086337036] [2020-11-30 02:57:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-30 02:57:17,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-30 02:57:17,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086337036] [2020-11-30 02:57:17,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:17,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516016885] [2020-11-30 02:57:17,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:17,225 INFO L87 Difference]: Start difference. First operand 506 states and 702 transitions. Second operand 3 states. [2020-11-30 02:57:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:17,282 INFO L93 Difference]: Finished difference Result 1023 states and 1418 transitions. [2020-11-30 02:57:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:17,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-30 02:57:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:17,289 INFO L225 Difference]: With dead ends: 1023 [2020-11-30 02:57:17,289 INFO L226 Difference]: Without dead ends: 527 [2020-11-30 02:57:17,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 02:57:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2020-11-30 02:57:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2020-11-30 02:57:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-11-30 02:57:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2020-11-30 02:57:17,320 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 103 [2020-11-30 02:57:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:17,321 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2020-11-30 02:57:17,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2020-11-30 02:57:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-30 02:57:17,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:17,323 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-11-30 02:57:17,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-30 02:57:17,538 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1168582955, now seen corresponding path program 1 times [2020-11-30 02:57:17,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:17,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252846441] [2020-11-30 02:57:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-11-30 02:57:17,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-11-30 02:57:17,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252846441] [2020-11-30 02:57:17,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:17,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733001724] [2020-11-30 02:57:17,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:17,685 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand 3 states. [2020-11-30 02:57:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:17,734 INFO L93 Difference]: Finished difference Result 1070 states and 1478 transitions. [2020-11-30 02:57:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:17,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-11-30 02:57:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:17,741 INFO L225 Difference]: With dead ends: 1070 [2020-11-30 02:57:17,741 INFO L226 Difference]: Without dead ends: 553 [2020-11-30 02:57:17,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 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 02:57:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-11-30 02:57:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2020-11-30 02:57:17,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-11-30 02:57:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 762 transitions. [2020-11-30 02:57:17,774 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 762 transitions. Word has length 104 [2020-11-30 02:57:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:17,774 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 762 transitions. [2020-11-30 02:57:17,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 762 transitions. [2020-11-30 02:57:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-30 02:57:17,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:17,778 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2020-11-30 02:57:17,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-30 02:57:17,998 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:17,999 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2020-11-30 02:57:17,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:17,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738083432] [2020-11-30 02:57:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:18,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-30 02:57:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-11-30 02:57:18,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738083432] [2020-11-30 02:57:18,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:18,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:57:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227682714] [2020-11-30 02:57:18,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:57:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:57:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:57:18,160 INFO L87 Difference]: Start difference. First operand 553 states and 762 transitions. Second operand 4 states. [2020-11-30 02:57:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:18,261 INFO L93 Difference]: Finished difference Result 1520 states and 2113 transitions. [2020-11-30 02:57:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:57:18,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-11-30 02:57:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:18,268 INFO L225 Difference]: With dead ends: 1520 [2020-11-30 02:57:18,268 INFO L226 Difference]: Without dead ends: 1003 [2020-11-30 02:57:18,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 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 02:57:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-11-30 02:57:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2020-11-30 02:57:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-11-30 02:57:18,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1392 transitions. [2020-11-30 02:57:18,311 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1392 transitions. Word has length 105 [2020-11-30 02:57:18,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:18,311 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1392 transitions. [2020-11-30 02:57:18,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:57:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1392 transitions. [2020-11-30 02:57:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-30 02:57:18,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:18,317 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2020-11-30 02:57:18,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-11-30 02:57:18,532 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2020-11-30 02:57:18,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:18,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486770731] [2020-11-30 02:57:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-30 02:57:18,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-11-30 02:57:18,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486770731] [2020-11-30 02:57:18,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:18,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:57:18,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516698411] [2020-11-30 02:57:18,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:57:18,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:57:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:57:18,791 INFO L87 Difference]: Start difference. First operand 1003 states and 1392 transitions. Second operand 4 states. [2020-11-30 02:57:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:19,187 INFO L93 Difference]: Finished difference Result 2091 states and 2938 transitions. [2020-11-30 02:57:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:57:19,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-11-30 02:57:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:19,196 INFO L225 Difference]: With dead ends: 2091 [2020-11-30 02:57:19,197 INFO L226 Difference]: Without dead ends: 1124 [2020-11-30 02:57:19,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 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 02:57:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2020-11-30 02:57:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1095. [2020-11-30 02:57:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-11-30 02:57:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1500 transitions. [2020-11-30 02:57:19,266 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1500 transitions. Word has length 173 [2020-11-30 02:57:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:19,266 INFO L481 AbstractCegarLoop]: Abstraction has 1095 states and 1500 transitions. [2020-11-30 02:57:19,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:57:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1500 transitions. [2020-11-30 02:57:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-30 02:57:19,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:19,272 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2020-11-30 02:57:19,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-11-30 02:57:19,485 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:19,486 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2020-11-30 02:57:19,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:19,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232159153] [2020-11-30 02:57:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:57:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:57:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:57:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-30 02:57:19,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:57:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-30 02:57:19,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232159153] [2020-11-30 02:57:19,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:57:19,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:57:19,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091008553] [2020-11-30 02:57:19,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:57:19,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:57:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:57:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:57:19,767 INFO L87 Difference]: Start difference. First operand 1095 states and 1500 transitions. Second operand 3 states. [2020-11-30 02:57:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:57:19,823 INFO L93 Difference]: Finished difference Result 2409 states and 3304 transitions. [2020-11-30 02:57:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:57:19,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2020-11-30 02:57:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:57:19,834 INFO L225 Difference]: With dead ends: 2409 [2020-11-30 02:57:19,834 INFO L226 Difference]: Without dead ends: 1350 [2020-11-30 02:57:19,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 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 02:57:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2020-11-30 02:57:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1350. [2020-11-30 02:57:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2020-11-30 02:57:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1847 transitions. [2020-11-30 02:57:19,926 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1847 transitions. Word has length 194 [2020-11-30 02:57:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:57:19,927 INFO L481 AbstractCegarLoop]: Abstraction has 1350 states and 1847 transitions. [2020-11-30 02:57:19,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:57:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1847 transitions. [2020-11-30 02:57:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-30 02:57:19,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:57:19,933 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2020-11-30 02:57:20,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-11-30 02:57:20,151 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:57:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:57:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2020-11-30 02:57:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:57:20,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354811127] [2020-11-30 02:57:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-30 02:57:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:57:20,317 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:57:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:57:20,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:57:20,752 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-30 02:57:20,752 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:57:20,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-11-30 02:57:21,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:57:21 BoogieIcfgContainer [2020-11-30 02:57:21,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:57:21,166 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:57:21,166 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:57:21,166 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:57:21,167 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:57:11" (3/4) ... [2020-11-30 02:57:21,169 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 02:57:21,342 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dd2c7c64-af15-47bf-8a71-6e17d683987d/bin/utaipan/witness.graphml [2020-11-30 02:57:21,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:57:21,344 INFO L168 Benchmark]: Toolchain (without parser) took 11759.97 ms. Allocated memory was 52.4 MB in the beginning and 172.0 MB in the end (delta: 119.5 MB). Free memory was 29.5 MB in the beginning and 147.5 MB in the end (delta: -118.0 MB). Peak memory consumption was 100.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,345 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 34.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:57:21,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 505.54 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 28.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.12 ms. Allocated memory is still 52.4 MB. Free memory was 28.0 MB in the beginning and 25.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,346 INFO L168 Benchmark]: Boogie Preprocessor took 88.84 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 25.5 MB in the beginning and 45.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,346 INFO L168 Benchmark]: RCFGBuilder took 1457.52 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 32.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,347 INFO L168 Benchmark]: TraceAbstraction took 9449.10 ms. Allocated memory was 62.9 MB in the beginning and 172.0 MB in the end (delta: 109.1 MB). Free memory was 32.3 MB in the beginning and 72.7 MB in the end (delta: -40.4 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,347 INFO L168 Benchmark]: Witness Printer took 176.47 ms. Allocated memory is still 172.0 MB. Free memory was 72.7 MB in the beginning and 147.5 MB in the end (delta: -74.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:57:21,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 52.4 MB. Free memory is still 34.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 505.54 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 28.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.12 ms. Allocated memory is still 52.4 MB. Free memory was 28.0 MB in the beginning and 25.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.84 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 25.5 MB in the beginning and 45.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1457.52 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 32.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9449.10 ms. Allocated memory was 62.9 MB in the beginning and 172.0 MB in the end (delta: 109.1 MB). Free memory was 32.3 MB in the beginning and 72.7 MB in the end (delta: -40.4 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. * Witness Printer took 176.47 ms. Allocated memory is still 172.0 MB. Free memory was 72.7 MB in the beginning and 147.5 MB in the end (delta: -74.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 ; [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate ; [L28] unsigned int s__ctx__stats__sess_connect ; [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags ; [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 ; [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L3] __assert_fail("0", "s3_clnt_2.BV.c.cil-2a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 126 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2289 SDtfs, 1139 SDslu, 1557 SDs, 0 SdLazy, 931 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2198 GetRequests, 2182 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1350occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 1307 NumberOfCodeBlocks, 1307 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2198 ConstructedInterpolants, 0 QuantifiedInterpolants, 431278 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1930 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 3576/3576 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 incorrect! Received shutdown request...