./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.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_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 23:58:46,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:58:46,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:58:46,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:58:46,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:58:46,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:58:46,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:58:46,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:58:46,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:58:46,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:58:46,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:58:46,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:58:46,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:58:46,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:58:46,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:58:46,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:58:46,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:58:46,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:58:47,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:58:47,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:58:47,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:58:47,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:58:47,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:58:47,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:58:47,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:58:47,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:58:47,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:58:47,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:58:47,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:58:47,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:58:47,037 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:58:47,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:58:47,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:58:47,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:58:47,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:58:47,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:58:47,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:58:47,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:58:47,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:58:47,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:58:47,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:58:47,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:58:47,103 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:58:47,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:58:47,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:58:47,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:58:47,107 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:58:47,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:58:47,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:58:47,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:58:47,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:58:47,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:58:47,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:58:47,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:58:47,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:58:47,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:58:47,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:58:47,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:58:47,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:58:47,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:58:47,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:58:47,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:58:47,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:58:47,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:58:47,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:58:47,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:58:47,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:58:47,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:58:47,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:58:47,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:58:47,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:58:47,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 [2020-11-29 23:58:47,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:58:47,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:58:47,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:58:47,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:58:47,490 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:58:47,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-11-29 23:58:47,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/data/83c0c2bc5/0420d4be754646cf9a95575da6abae97/FLAG354af6c29 [2020-11-29 23:58:48,139 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:58:48,140 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-11-29 23:58:48,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/data/83c0c2bc5/0420d4be754646cf9a95575da6abae97/FLAG354af6c29 [2020-11-29 23:58:48,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/data/83c0c2bc5/0420d4be754646cf9a95575da6abae97 [2020-11-29 23:58:48,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:58:48,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:58:48,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:48,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:58:48,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:58:48,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:48" (1/1) ... [2020-11-29 23:58:48,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35df7bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:48, skipping insertion in model container [2020-11-29 23:58:48,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:58:48" (1/1) ... [2020-11-29 23:58:48,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:58:48,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:58:48,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:48,951 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:58:49,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:58:49,063 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:58:49,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49 WrapperNode [2020-11-29 23:58:49,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:58:49,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:49,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:58:49,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:58:49,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:58:49,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:58:49,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:58:49,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:58:49,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... [2020-11-29 23:58:49,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:58:49,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:58:49,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:58:49,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:58:49,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/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 [2020-11-29 23:58:49,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:58:49,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:58:49,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:58:49,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:58:49,584 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-29 23:58:50,588 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-11-29 23:58:50,589 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-11-29 23:58:50,610 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:58:50,610 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 23:58:50,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:50 BoogieIcfgContainer [2020-11-29 23:58:50,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:58:50,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:58:50,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:58:50,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:58:50,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:58:48" (1/3) ... [2020-11-29 23:58:50,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651b1032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:58:50, skipping insertion in model container [2020-11-29 23:58:50,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:58:49" (2/3) ... [2020-11-29 23:58:50,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651b1032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:58:50, skipping insertion in model container [2020-11-29 23:58:50,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:50" (3/3) ... [2020-11-29 23:58:50,630 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-11-29 23:58:50,648 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:58:50,654 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:58:50,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:58:50,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:58:50,700 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:58:50,701 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:58:50,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:58:50,701 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:58:50,701 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:58:50,701 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:58:50,702 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:58:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-11-29 23:58:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 23:58:50,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:50,728 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] [2020-11-29 23:58:50,729 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1180429726, now seen corresponding path program 1 times [2020-11-29 23:58:50,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:50,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025737124] [2020-11-29 23:58:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:51,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025737124] [2020-11-29 23:58:51,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:51,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215141969] [2020-11-29 23:58:51,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:51,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:51,122 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-11-29 23:58:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:51,493 INFO L93 Difference]: Finished difference Result 325 states and 557 transitions. [2020-11-29 23:58:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:51,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-29 23:58:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:51,513 INFO L225 Difference]: With dead ends: 325 [2020-11-29 23:58:51,513 INFO L226 Difference]: Without dead ends: 161 [2020-11-29 23:58:51,517 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 [2020-11-29 23:58:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-11-29 23:58:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-11-29 23:58:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-11-29 23:58:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 249 transitions. [2020-11-29 23:58:51,579 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 249 transitions. Word has length 23 [2020-11-29 23:58:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:51,579 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 249 transitions. [2020-11-29 23:58:51,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 249 transitions. [2020-11-29 23:58:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:58:51,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:51,584 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] [2020-11-29 23:58:51,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:58:51,584 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash -932054356, now seen corresponding path program 1 times [2020-11-29 23:58:51,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:51,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521825667] [2020-11-29 23:58:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:51,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521825667] [2020-11-29 23:58:51,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:51,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:51,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245686146] [2020-11-29 23:58:51,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:51,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:51,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:51,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:51,665 INFO L87 Difference]: Start difference. First operand 157 states and 249 transitions. Second operand 3 states. [2020-11-29 23:58:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:51,963 INFO L93 Difference]: Finished difference Result 331 states and 523 transitions. [2020-11-29 23:58:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:51,964 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-29 23:58:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:51,971 INFO L225 Difference]: With dead ends: 331 [2020-11-29 23:58:51,971 INFO L226 Difference]: Without dead ends: 182 [2020-11-29 23:58:51,973 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 [2020-11-29 23:58:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-11-29 23:58:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-11-29 23:58:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-29 23:58:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2020-11-29 23:58:52,012 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 24 [2020-11-29 23:58:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:52,013 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2020-11-29 23:58:52,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2020-11-29 23:58:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:58:52,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:52,017 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] [2020-11-29 23:58:52,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:58:52,017 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -945010985, now seen corresponding path program 1 times [2020-11-29 23:58:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:52,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951590245] [2020-11-29 23:58:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:52,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951590245] [2020-11-29 23:58:52,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:52,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:52,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148294347] [2020-11-29 23:58:52,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:52,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:52,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:52,124 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand 3 states. [2020-11-29 23:58:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:52,392 INFO L93 Difference]: Finished difference Result 362 states and 567 transitions. [2020-11-29 23:58:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:52,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-29 23:58:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:52,396 INFO L225 Difference]: With dead ends: 362 [2020-11-29 23:58:52,397 INFO L226 Difference]: Without dead ends: 190 [2020-11-29 23:58:52,398 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 [2020-11-29 23:58:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-29 23:58:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-11-29 23:58:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-29 23:58:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2020-11-29 23:58:52,441 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 24 [2020-11-29 23:58:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:52,442 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2020-11-29 23:58:52,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2020-11-29 23:58:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 23:58:52,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:52,445 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] [2020-11-29 23:58:52,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:58:52,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1648361961, now seen corresponding path program 1 times [2020-11-29 23:58:52,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:52,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672765810] [2020-11-29 23:58:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672765810] [2020-11-29 23:58:52,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:52,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:52,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900550926] [2020-11-29 23:58:52,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:52,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:52,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:52,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:52,572 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand 3 states. [2020-11-29 23:58:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:52,819 INFO L93 Difference]: Finished difference Result 367 states and 577 transitions. [2020-11-29 23:58:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:52,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-11-29 23:58:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:52,821 INFO L225 Difference]: With dead ends: 367 [2020-11-29 23:58:52,821 INFO L226 Difference]: Without dead ends: 189 [2020-11-29 23:58:52,823 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 [2020-11-29 23:58:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-29 23:58:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-11-29 23:58:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 23:58:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 294 transitions. [2020-11-29 23:58:52,853 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 294 transitions. Word has length 24 [2020-11-29 23:58:52,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:52,854 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 294 transitions. [2020-11-29 23:58:52,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 294 transitions. [2020-11-29 23:58:52,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 23:58:52,856 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:52,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:52,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 23:58:52,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash 688817562, now seen corresponding path program 1 times [2020-11-29 23:58:52,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:52,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172805484] [2020-11-29 23:58:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:52,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172805484] [2020-11-29 23:58:52,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:52,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:52,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289487977] [2020-11-29 23:58:52,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:52,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:52,952 INFO L87 Difference]: Start difference. First operand 187 states and 294 transitions. Second operand 3 states. [2020-11-29 23:58:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:53,170 INFO L93 Difference]: Finished difference Result 378 states and 589 transitions. [2020-11-29 23:58:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:53,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-11-29 23:58:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:53,172 INFO L225 Difference]: With dead ends: 378 [2020-11-29 23:58:53,173 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 23:58:53,174 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 [2020-11-29 23:58:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 23:58:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-11-29 23:58:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 23:58:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 292 transitions. [2020-11-29 23:58:53,187 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 292 transitions. Word has length 25 [2020-11-29 23:58:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:53,192 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 292 transitions. [2020-11-29 23:58:53,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 292 transitions. [2020-11-29 23:58:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:58:53,194 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:53,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:53,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 23:58:53,194 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:53,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1643637293, now seen corresponding path program 1 times [2020-11-29 23:58:53,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:53,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555226108] [2020-11-29 23:58:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:53,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555226108] [2020-11-29 23:58:53,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:53,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:53,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084314900] [2020-11-29 23:58:53,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:53,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:53,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:53,265 INFO L87 Difference]: Start difference. First operand 187 states and 292 transitions. Second operand 3 states. [2020-11-29 23:58:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:53,470 INFO L93 Difference]: Finished difference Result 378 states and 585 transitions. [2020-11-29 23:58:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:53,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-11-29 23:58:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:53,473 INFO L225 Difference]: With dead ends: 378 [2020-11-29 23:58:53,473 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 23:58:53,474 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 [2020-11-29 23:58:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 23:58:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-11-29 23:58:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 23:58:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 290 transitions. [2020-11-29 23:58:53,495 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 290 transitions. Word has length 26 [2020-11-29 23:58:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:53,496 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 290 transitions. [2020-11-29 23:58:53,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 290 transitions. [2020-11-29 23:58:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:58:53,497 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:53,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:53,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 23:58:53,497 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash 807002645, now seen corresponding path program 1 times [2020-11-29 23:58:53,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:53,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460760376] [2020-11-29 23:58:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:53,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460760376] [2020-11-29 23:58:53,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:53,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046117174] [2020-11-29 23:58:53,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:53,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:53,583 INFO L87 Difference]: Start difference. First operand 187 states and 290 transitions. Second operand 3 states. [2020-11-29 23:58:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:53,795 INFO L93 Difference]: Finished difference Result 378 states and 581 transitions. [2020-11-29 23:58:53,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:53,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 23:58:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:53,798 INFO L225 Difference]: With dead ends: 378 [2020-11-29 23:58:53,798 INFO L226 Difference]: Without dead ends: 199 [2020-11-29 23:58:53,799 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 [2020-11-29 23:58:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-29 23:58:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-11-29 23:58:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-29 23:58:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 288 transitions. [2020-11-29 23:58:53,820 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 288 transitions. Word has length 27 [2020-11-29 23:58:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:53,823 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 288 transitions. [2020-11-29 23:58:53,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 288 transitions. [2020-11-29 23:58:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 23:58:53,828 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:53,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:53,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 23:58:53,829 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash -583213996, now seen corresponding path program 1 times [2020-11-29 23:58:53,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:53,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281180737] [2020-11-29 23:58:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281180737] [2020-11-29 23:58:53,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:53,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584403754] [2020-11-29 23:58:53,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:53,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:53,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:53,901 INFO L87 Difference]: Start difference. First operand 187 states and 288 transitions. Second operand 3 states. [2020-11-29 23:58:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:53,934 INFO L93 Difference]: Finished difference Result 537 states and 823 transitions. [2020-11-29 23:58:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:53,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-11-29 23:58:53,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:53,938 INFO L225 Difference]: With dead ends: 537 [2020-11-29 23:58:53,938 INFO L226 Difference]: Without dead ends: 358 [2020-11-29 23:58:53,939 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 [2020-11-29 23:58:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-29 23:58:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2020-11-29 23:58:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-11-29 23:58:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 543 transitions. [2020-11-29 23:58:53,962 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 543 transitions. Word has length 27 [2020-11-29 23:58:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:53,963 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 543 transitions. [2020-11-29 23:58:53,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 543 transitions. [2020-11-29 23:58:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 23:58:53,964 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:53,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:53,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 23:58:53,965 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1263978570, now seen corresponding path program 1 times [2020-11-29 23:58:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:53,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857341006] [2020-11-29 23:58:53,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:54,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857341006] [2020-11-29 23:58:54,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:54,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:58:54,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74091035] [2020-11-29 23:58:54,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:58:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:58:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:58:54,066 INFO L87 Difference]: Start difference. First operand 356 states and 543 transitions. Second operand 4 states. [2020-11-29 23:58:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:54,514 INFO L93 Difference]: Finished difference Result 1100 states and 1680 transitions. [2020-11-29 23:58:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 23:58:54,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-11-29 23:58:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:54,520 INFO L225 Difference]: With dead ends: 1100 [2020-11-29 23:58:54,520 INFO L226 Difference]: Without dead ends: 753 [2020-11-29 23:58:54,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:58:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-11-29 23:58:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 599. [2020-11-29 23:58:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-11-29 23:58:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2020-11-29 23:58:54,558 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 28 [2020-11-29 23:58:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:54,559 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2020-11-29 23:58:54,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:58:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2020-11-29 23:58:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 23:58:54,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:54,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:54,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 23:58:54,568 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash -737748410, now seen corresponding path program 1 times [2020-11-29 23:58:54,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:54,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727028952] [2020-11-29 23:58:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:54,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727028952] [2020-11-29 23:58:54,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:54,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:54,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289080545] [2020-11-29 23:58:54,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:54,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:54,652 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand 3 states. [2020-11-29 23:58:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:54,953 INFO L93 Difference]: Finished difference Result 1331 states and 2092 transitions. [2020-11-29 23:58:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:54,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-11-29 23:58:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:54,960 INFO L225 Difference]: With dead ends: 1331 [2020-11-29 23:58:54,961 INFO L226 Difference]: Without dead ends: 741 [2020-11-29 23:58:54,962 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 [2020-11-29 23:58:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-11-29 23:58:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 721. [2020-11-29 23:58:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-11-29 23:58:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1143 transitions. [2020-11-29 23:58:55,005 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1143 transitions. Word has length 42 [2020-11-29 23:58:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:55,006 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1143 transitions. [2020-11-29 23:58:55,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1143 transitions. [2020-11-29 23:58:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 23:58:55,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:55,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:58:55,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 23:58:55,009 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash 948641384, now seen corresponding path program 1 times [2020-11-29 23:58:55,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:55,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122055473] [2020-11-29 23:58:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:55,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122055473] [2020-11-29 23:58:55,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336752698] [2020-11-29 23:58:55,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:55,098 INFO L87 Difference]: Start difference. First operand 721 states and 1143 transitions. Second operand 3 states. [2020-11-29 23:58:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:55,408 INFO L93 Difference]: Finished difference Result 1498 states and 2392 transitions. [2020-11-29 23:58:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:55,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-11-29 23:58:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:55,415 INFO L225 Difference]: With dead ends: 1498 [2020-11-29 23:58:55,415 INFO L226 Difference]: Without dead ends: 786 [2020-11-29 23:58:55,417 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 [2020-11-29 23:58:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-11-29 23:58:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 766. [2020-11-29 23:58:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-11-29 23:58:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1228 transitions. [2020-11-29 23:58:55,461 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1228 transitions. Word has length 43 [2020-11-29 23:58:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:55,461 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1228 transitions. [2020-11-29 23:58:55,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1228 transitions. [2020-11-29 23:58:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 23:58:55,464 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:55,464 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:55,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 23:58:55,464 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2093549194, now seen corresponding path program 1 times [2020-11-29 23:58:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:55,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607041343] [2020-11-29 23:58:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:55,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607041343] [2020-11-29 23:58:55,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:55,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:55,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835019328] [2020-11-29 23:58:55,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:55,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:55,513 INFO L87 Difference]: Start difference. First operand 766 states and 1228 transitions. Second operand 3 states. [2020-11-29 23:58:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:55,549 INFO L93 Difference]: Finished difference Result 1523 states and 2443 transitions. [2020-11-29 23:58:55,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:55,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-11-29 23:58:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:55,556 INFO L225 Difference]: With dead ends: 1523 [2020-11-29 23:58:55,556 INFO L226 Difference]: Without dead ends: 766 [2020-11-29 23:58:55,558 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 [2020-11-29 23:58:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-11-29 23:58:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2020-11-29 23:58:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-11-29 23:58:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1211 transitions. [2020-11-29 23:58:55,599 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1211 transitions. Word has length 44 [2020-11-29 23:58:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:55,599 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1211 transitions. [2020-11-29 23:58:55,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1211 transitions. [2020-11-29 23:58:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 23:58:55,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:55,602 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:55,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 23:58:55,602 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1190502023, now seen corresponding path program 1 times [2020-11-29 23:58:55,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:55,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916573791] [2020-11-29 23:58:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:55,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916573791] [2020-11-29 23:58:55,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:55,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:55,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130548343] [2020-11-29 23:58:55,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:55,686 INFO L87 Difference]: Start difference. First operand 766 states and 1211 transitions. Second operand 3 states. [2020-11-29 23:58:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:55,748 INFO L93 Difference]: Finished difference Result 1537 states and 2426 transitions. [2020-11-29 23:58:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:55,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-11-29 23:58:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:55,756 INFO L225 Difference]: With dead ends: 1537 [2020-11-29 23:58:55,756 INFO L226 Difference]: Without dead ends: 780 [2020-11-29 23:58:55,759 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 [2020-11-29 23:58:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-11-29 23:58:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2020-11-29 23:58:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-11-29 23:58:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1209 transitions. [2020-11-29 23:58:55,841 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1209 transitions. Word has length 45 [2020-11-29 23:58:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:55,842 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1209 transitions. [2020-11-29 23:58:55,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1209 transitions. [2020-11-29 23:58:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 23:58:55,844 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:55,845 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:55,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 23:58:55,845 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -881523047, now seen corresponding path program 1 times [2020-11-29 23:58:55,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:55,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231039873] [2020-11-29 23:58:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:55,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231039873] [2020-11-29 23:58:55,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:55,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:55,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912880362] [2020-11-29 23:58:55,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:55,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:55,905 INFO L87 Difference]: Start difference. First operand 778 states and 1209 transitions. Second operand 3 states. [2020-11-29 23:58:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:55,978 INFO L93 Difference]: Finished difference Result 2299 states and 3573 transitions. [2020-11-29 23:58:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:55,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-11-29 23:58:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:55,990 INFO L225 Difference]: With dead ends: 2299 [2020-11-29 23:58:55,990 INFO L226 Difference]: Without dead ends: 1530 [2020-11-29 23:58:55,993 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 [2020-11-29 23:58:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-11-29 23:58:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1218. [2020-11-29 23:58:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-11-29 23:58:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1885 transitions. [2020-11-29 23:58:56,071 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1885 transitions. Word has length 50 [2020-11-29 23:58:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:56,072 INFO L481 AbstractCegarLoop]: Abstraction has 1218 states and 1885 transitions. [2020-11-29 23:58:56,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1885 transitions. [2020-11-29 23:58:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 23:58:56,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:56,075 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:56,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 23:58:56,076 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 11963291, now seen corresponding path program 1 times [2020-11-29 23:58:56,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:56,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168524020] [2020-11-29 23:58:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:56,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168524020] [2020-11-29 23:58:56,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:56,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:56,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462585346] [2020-11-29 23:58:56,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:56,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:56,123 INFO L87 Difference]: Start difference. First operand 1218 states and 1885 transitions. Second operand 3 states. [2020-11-29 23:58:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:56,470 INFO L93 Difference]: Finished difference Result 2639 states and 4073 transitions. [2020-11-29 23:58:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:56,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-11-29 23:58:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:56,481 INFO L225 Difference]: With dead ends: 2639 [2020-11-29 23:58:56,481 INFO L226 Difference]: Without dead ends: 1431 [2020-11-29 23:58:56,485 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 [2020-11-29 23:58:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-29 23:58:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1325. [2020-11-29 23:58:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-11-29 23:58:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2000 transitions. [2020-11-29 23:58:56,558 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2000 transitions. Word has length 50 [2020-11-29 23:58:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:56,559 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2000 transitions. [2020-11-29 23:58:56,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2000 transitions. [2020-11-29 23:58:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 23:58:56,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:56,563 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:56,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 23:58:56,563 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash 776292063, now seen corresponding path program 1 times [2020-11-29 23:58:56,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:56,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456094430] [2020-11-29 23:58:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 23:58:56,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456094430] [2020-11-29 23:58:56,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:56,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151708097] [2020-11-29 23:58:56,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:56,607 INFO L87 Difference]: Start difference. First operand 1325 states and 2000 transitions. Second operand 3 states. [2020-11-29 23:58:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:56,910 INFO L93 Difference]: Finished difference Result 2808 states and 4234 transitions. [2020-11-29 23:58:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:56,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-11-29 23:58:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:56,922 INFO L225 Difference]: With dead ends: 2808 [2020-11-29 23:58:56,922 INFO L226 Difference]: Without dead ends: 1493 [2020-11-29 23:58:56,925 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 [2020-11-29 23:58:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2020-11-29 23:58:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1451. [2020-11-29 23:58:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1451 states. [2020-11-29 23:58:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2137 transitions. [2020-11-29 23:58:56,999 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2137 transitions. Word has length 55 [2020-11-29 23:58:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:56,999 INFO L481 AbstractCegarLoop]: Abstraction has 1451 states and 2137 transitions. [2020-11-29 23:58:57,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2137 transitions. [2020-11-29 23:58:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 23:58:57,003 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:57,004 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:57,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 23:58:57,004 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1456350433, now seen corresponding path program 1 times [2020-11-29 23:58:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060209628] [2020-11-29 23:58:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-29 23:58:57,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060209628] [2020-11-29 23:58:57,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:57,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:57,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432861794] [2020-11-29 23:58:57,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:57,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:57,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:57,049 INFO L87 Difference]: Start difference. First operand 1451 states and 2137 transitions. Second operand 3 states. [2020-11-29 23:58:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:57,118 INFO L93 Difference]: Finished difference Result 2739 states and 4009 transitions. [2020-11-29 23:58:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:57,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-11-29 23:58:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:57,131 INFO L225 Difference]: With dead ends: 2739 [2020-11-29 23:58:57,132 INFO L226 Difference]: Without dead ends: 1828 [2020-11-29 23:58:57,134 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 [2020-11-29 23:58:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-11-29 23:58:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1313. [2020-11-29 23:58:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1313 states. [2020-11-29 23:58:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1919 transitions. [2020-11-29 23:58:57,224 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1919 transitions. Word has length 55 [2020-11-29 23:58:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:57,224 INFO L481 AbstractCegarLoop]: Abstraction has 1313 states and 1919 transitions. [2020-11-29 23:58:57,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1919 transitions. [2020-11-29 23:58:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-29 23:58:57,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:57,228 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:57,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 23:58:57,228 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1301716177, now seen corresponding path program 1 times [2020-11-29 23:58:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:57,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096567359] [2020-11-29 23:58:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:58:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:58:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096567359] [2020-11-29 23:58:57,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:58:57,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:58:57,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179546088] [2020-11-29 23:58:57,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 23:58:57,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:58:57,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 23:58:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 23:58:57,314 INFO L87 Difference]: Start difference. First operand 1313 states and 1919 transitions. Second operand 3 states. [2020-11-29 23:58:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:58:57,444 INFO L93 Difference]: Finished difference Result 3800 states and 5511 transitions. [2020-11-29 23:58:57,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 23:58:57,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-11-29 23:58:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:58:57,461 INFO L225 Difference]: With dead ends: 3800 [2020-11-29 23:58:57,462 INFO L226 Difference]: Without dead ends: 2497 [2020-11-29 23:58:57,465 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 [2020-11-29 23:58:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2020-11-29 23:58:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2495. [2020-11-29 23:58:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2495 states. [2020-11-29 23:58:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3572 transitions. [2020-11-29 23:58:57,590 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3572 transitions. Word has length 56 [2020-11-29 23:58:57,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:58:57,590 INFO L481 AbstractCegarLoop]: Abstraction has 2495 states and 3572 transitions. [2020-11-29 23:58:57,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 23:58:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3572 transitions. [2020-11-29 23:58:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-29 23:58:57,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:58:57,595 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-29 23:58:57,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 23:58:57,596 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:58:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:58:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1196163616, now seen corresponding path program 1 times [2020-11-29 23:58:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:58:57,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347554995] [2020-11-29 23:58:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:58:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:57,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:58:57,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:58:57,716 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:58:57,716 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:58:57,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 23:58:57,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:58:57 BoogieIcfgContainer [2020-11-29 23:58:57,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:58:57,844 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:58:57,844 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:58:57,844 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:58:57,845 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:58:50" (3/4) ... [2020-11-29 23:58:57,847 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:58:57,966 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0e72c249-8d36-480d-9d33-4cbe02ec08ad/bin/uautomizer/witness.graphml [2020-11-29 23:58:57,966 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:58:57,968 INFO L168 Benchmark]: Toolchain (without parser) took 9478.69 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 61.5 MB in the beginning and 148.6 MB in the end (delta: -87.1 MB). Peak memory consumption was 99.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,969 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 70.2 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:58:57,969 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.73 ms. Allocated memory is still 96.5 MB. Free memory was 61.3 MB in the beginning and 68.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,970 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.07 ms. Allocated memory is still 96.5 MB. Free memory was 68.7 MB in the beginning and 66.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,970 INFO L168 Benchmark]: Boogie Preprocessor took 81.72 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 63.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,971 INFO L168 Benchmark]: RCFGBuilder took 1358.27 ms. Allocated memory is still 96.5 MB. Free memory was 63.4 MB in the beginning and 48.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,971 INFO L168 Benchmark]: TraceAbstraction took 7221.67 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 48.2 MB in the beginning and 50.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 85.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,972 INFO L168 Benchmark]: Witness Printer took 122.33 ms. Allocated memory is still 182.5 MB. Free memory was 50.9 MB in the beginning and 148.6 MB in the end (delta: -97.7 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:58:57,974 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 70.2 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 573.73 ms. Allocated memory is still 96.5 MB. Free memory was 61.3 MB in the beginning and 68.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 111.07 ms. Allocated memory is still 96.5 MB. Free memory was 68.7 MB in the beginning and 66.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 81.72 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 63.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1358.27 ms. Allocated memory is still 96.5 MB. Free memory was 63.4 MB in the beginning and 48.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7221.67 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 48.2 MB in the beginning and 50.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 85.2 MB. Max. memory is 16.1 GB. * Witness Printer took 122.33 ms. Allocated memory is still 182.5 MB. Free memory was 50.9 MB in the beginning and 148.6 MB in the end (delta: -97.7 MB). Peak memory consumption was 3.0 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: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__hit = __VERIFIER_nondet_int() ; [L22] int s__rwstate ; [L23] int s__init_buf___0 = 1; [L24] int s__debug = __VERIFIER_nondet_int() ; [L25] int s__shutdown ; [L26] int s__cert = __VERIFIER_nondet_int() ; [L27] int s__options = __VERIFIER_nondet_int() ; [L28] int s__verify_mode = __VERIFIER_nondet_int() ; [L29] int s__session__peer = __VERIFIER_nondet_int() ; [L30] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L31] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__cert_request ; [L36] int s__s3__tmp__reuse_message ; [L37] int s__s3__tmp__use_rsa_tmp ; [L38] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__next_state___0 ; [L41] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L42] int s__session__cipher ; [L43] int buf ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp ; [L47] int cb ; [L48] long num1 = __VERIFIER_nondet_long() ; [L49] int ret ; [L50] int new_state ; [L51] int state ; [L52] int skip ; [L53] int got_new_session ; [L54] int tmp___1 = __VERIFIER_nondet_int() ; [L55] int tmp___2 = __VERIFIER_nondet_int() ; [L56] int tmp___3 = __VERIFIER_nondet_int() ; [L57] int tmp___4 = __VERIFIER_nondet_int() ; [L58] int tmp___5 = __VERIFIER_nondet_int() ; [L59] int tmp___6 = __VERIFIER_nondet_int() ; [L60] int tmp___7 ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 = __VERIFIER_nondet_int() ; [L63] int tmp___10 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] unsigned long __cil_tmp57 ; [L68] unsigned long __cil_tmp58 ; [L69] unsigned long __cil_tmp59 ; [L70] int __cil_tmp60 ; [L71] unsigned long __cil_tmp61 ; [L74] s__s3__tmp__reuse_message = 0 [L75] s__state = initial_state [L76] blastFlag = 0 [L77] tmp = __VERIFIER_nondet_int() [L78] Time = tmp [L79] cb = 0 [L80] ret = -1 [L81] skip = 0 [L82] got_new_session = 0 [L83] COND TRUE s__info_callback != 0 [L84] cb = s__info_callback [L90] s__in_handshake ++ [L91] COND TRUE tmp___1 + 12288 [L92] COND TRUE tmp___2 + 16384 [L96] COND FALSE !(s__cert == 0) [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND TRUE s__state == 8464 [L273] s__shutdown = 0 [L274] ret = __VERIFIER_nondet_int() [L275] COND TRUE blastFlag == 0 [L276] blastFlag = 1 [L278] COND FALSE !(ret <= 0) [L281] got_new_session = 1 [L282] s__state = 8496 [L283] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND FALSE !(state == 8496) [L616] COND FALSE !(\read(s__debug)) [L622] COND TRUE cb != 0 [L623] COND TRUE s__state != state [L624] new_state = s__state [L625] s__state = state [L626] s__state = new_state [L631] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND TRUE s__state == 8496 [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 1 [L289] blastFlag = 2 [L291] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 8512 [L299] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND TRUE state == 8496 [L3] __assert_fail("0", "s3_srvr_14.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 152 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 19, TraceHistogramMax: 2, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3676 SDtfs, 3347 SDslu, 1453 SDs, 0 SdLazy, 1205 SolverSat, 447 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2495occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 18 MinimizatonAttempts, 1223 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 650 ConstructedInterpolants, 0 QuantifiedInterpolants, 76611 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 118/118 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...