./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-2.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_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8927ec5890c81ea18bc2a9cefa5e837a618c47d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-22 12:57:11,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:57:11,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:57:11,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:57:11,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:57:11,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:57:11,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:57:11,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:57:11,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:57:11,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:57:11,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:57:11,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:57:11,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:57:11,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:57:11,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:57:11,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:57:11,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:57:11,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:57:11,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:57:11,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:57:11,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:57:11,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:57:11,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:57:11,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:57:11,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:57:11,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:57:11,195 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:57:11,196 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:57:11,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:57:11,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:57:11,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:57:11,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:57:11,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:57:11,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:57:11,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:57:11,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:57:11,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:57:11,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:57:11,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:57:11,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:57:11,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:57:11,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:57:11,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:57:11,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:57:11,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:57:11,253 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:57:11,253 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:57:11,253 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:57:11,253 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:57:11,254 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:57:11,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:57:11,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:57:11,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:57:11,255 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:57:11,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:57:11,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:57:11,255 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:57:11,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:57:11,256 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:57:11,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:57:11,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:57:11,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:57:11,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:57:11,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:57:11,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:57:11,258 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:57:11,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:57:11,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:57:11,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:57:11,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:57:11,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:57:11,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:57:11,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:57:11,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:11,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:57:11,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:57:11,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:57:11,261 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:57:11,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:57:11,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:57:11,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:57:11,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:57:11,262 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8927ec5890c81ea18bc2a9cefa5e837a618c47d [2020-11-22 12:57:11,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:57:11,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:57:11,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:57:11,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:57:11,519 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:57:11,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-2.c [2020-11-22 12:57:11,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/data/030604c6c/b279030bec4847b59d0195027344a857/FLAGf652a2b92 [2020-11-22 12:57:12,140 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:57:12,141 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-2.c [2020-11-22 12:57:12,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/data/030604c6c/b279030bec4847b59d0195027344a857/FLAGf652a2b92 [2020-11-22 12:57:12,477 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/data/030604c6c/b279030bec4847b59d0195027344a857 [2020-11-22 12:57:12,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:57:12,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:57:12,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:12,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:57:12,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:57:12,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:12" (1/1) ... [2020-11-22 12:57:12,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfb20be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:12, skipping insertion in model container [2020-11-22 12:57:12,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:12" (1/1) ... [2020-11-22 12:57:12,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:57:12,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:57:12,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:12,895 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:57:12,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:13,012 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:57:13,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13 WrapperNode [2020-11-22 12:57:13,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:13,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:13,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:57:13,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:57:13,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:13,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:57:13,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:57:13,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:57:13,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... [2020-11-22 12:57:13,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:57:13,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:57:13,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:57:13,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:57:13,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:13,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:57:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:57:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:57:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:57:13,415 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-22 12:57:14,204 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2020-11-22 12:57:14,204 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2020-11-22 12:57:14,669 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:57:14,669 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 12:57:14,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:14 BoogieIcfgContainer [2020-11-22 12:57:14,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:57:14,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:57:14,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:57:14,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:57:14,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:57:12" (1/3) ... [2020-11-22 12:57:14,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2913057a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:14, skipping insertion in model container [2020-11-22 12:57:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:13" (2/3) ... [2020-11-22 12:57:14,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2913057a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:14, skipping insertion in model container [2020-11-22 12:57:14,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:14" (3/3) ... [2020-11-22 12:57:14,681 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_4.cil-2.c [2020-11-22 12:57:14,691 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:57:14,695 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:57:14,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:57:14,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:57:14,741 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:57:14,742 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:57:14,742 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:57:14,742 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:57:14,742 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:57:14,742 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:57:14,742 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:57:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states. [2020-11-22 12:57:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:57:14,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:14,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:14,767 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 500053521, now seen corresponding path program 1 times [2020-11-22 12:57:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:14,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987059972] [2020-11-22 12:57:14,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:15,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987059972] [2020-11-22 12:57:15,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:15,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:15,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001577168] [2020-11-22 12:57:15,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:15,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:15,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:15,044 INFO L87 Difference]: Start difference. First operand 85 states. Second operand 3 states. [2020-11-22 12:57:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:15,201 INFO L93 Difference]: Finished difference Result 171 states and 295 transitions. [2020-11-22 12:57:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:15,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-22 12:57:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:15,214 INFO L225 Difference]: With dead ends: 171 [2020-11-22 12:57:15,214 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 12:57:15,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 12:57:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-22 12:57:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-22 12:57:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2020-11-22 12:57:15,255 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 19 [2020-11-22 12:57:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:15,255 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2020-11-22 12:57:15,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2020-11-22 12:57:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-22 12:57:15,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:15,256 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:15,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:57:15,257 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -996387129, now seen corresponding path program 1 times [2020-11-22 12:57:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:15,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208288800] [2020-11-22 12:57:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:15,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208288800] [2020-11-22 12:57:15,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:15,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440223753] [2020-11-22 12:57:15,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:15,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:15,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:15,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:15,360 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand 3 states. [2020-11-22 12:57:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:15,554 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2020-11-22 12:57:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:15,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-11-22 12:57:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:15,557 INFO L225 Difference]: With dead ends: 180 [2020-11-22 12:57:15,557 INFO L226 Difference]: Without dead ends: 99 [2020-11-22 12:57:15,558 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 [2020-11-22 12:57:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-22 12:57:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-11-22 12:57:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-22 12:57:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2020-11-22 12:57:15,574 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 28 [2020-11-22 12:57:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:15,575 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2020-11-22 12:57:15,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2020-11-22 12:57:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-22 12:57:15,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:15,577 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:15,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:57:15,577 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:15,578 INFO L82 PathProgramCache]: Analyzing trace with hash 619007840, now seen corresponding path program 1 times [2020-11-22 12:57:15,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:15,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087875388] [2020-11-22 12:57:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:57:15,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087875388] [2020-11-22 12:57:15,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:15,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:15,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716467761] [2020-11-22 12:57:15,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:15,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:15,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:15,695 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand 3 states. [2020-11-22 12:57:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:15,851 INFO L93 Difference]: Finished difference Result 208 states and 299 transitions. [2020-11-22 12:57:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:15,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-22 12:57:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:15,853 INFO L225 Difference]: With dead ends: 208 [2020-11-22 12:57:15,853 INFO L226 Difference]: Without dead ends: 114 [2020-11-22 12:57:15,854 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 [2020-11-22 12:57:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-22 12:57:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-11-22 12:57:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-22 12:57:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 155 transitions. [2020-11-22 12:57:15,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 155 transitions. Word has length 39 [2020-11-22 12:57:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:15,877 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 155 transitions. [2020-11-22 12:57:15,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 155 transitions. [2020-11-22 12:57:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-22 12:57:15,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:15,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:15,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:57:15,880 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1767365492, now seen corresponding path program 1 times [2020-11-22 12:57:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:15,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142691241] [2020-11-22 12:57:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:57:15,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142691241] [2020-11-22 12:57:15,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333339637] [2020-11-22 12:57:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:16,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:57:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-22 12:57:16,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-22 12:57:16,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:57:16,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-11-22 12:57:16,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133735668] [2020-11-22 12:57:16,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:16,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:16,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:57:16,317 INFO L87 Difference]: Start difference. First operand 112 states and 155 transitions. Second operand 6 states. [2020-11-22 12:57:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:16,730 INFO L93 Difference]: Finished difference Result 315 states and 470 transitions. [2020-11-22 12:57:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:16,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-11-22 12:57:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:16,733 INFO L225 Difference]: With dead ends: 315 [2020-11-22 12:57:16,733 INFO L226 Difference]: Without dead ends: 205 [2020-11-22 12:57:16,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-22 12:57:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-11-22 12:57:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 187. [2020-11-22 12:57:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-11-22 12:57:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 256 transitions. [2020-11-22 12:57:16,749 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 256 transitions. Word has length 52 [2020-11-22 12:57:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:16,750 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 256 transitions. [2020-11-22 12:57:16,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 256 transitions. [2020-11-22 12:57:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-22 12:57:16,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:16,752 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:16,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:16,966 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash -231813745, now seen corresponding path program 1 times [2020-11-22 12:57:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:16,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144651436] [2020-11-22 12:57:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-11-22 12:57:17,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144651436] [2020-11-22 12:57:17,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:17,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:17,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367699581] [2020-11-22 12:57:17,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:17,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:17,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:17,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:17,076 INFO L87 Difference]: Start difference. First operand 187 states and 256 transitions. Second operand 3 states. [2020-11-22 12:57:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:17,240 INFO L93 Difference]: Finished difference Result 392 states and 545 transitions. [2020-11-22 12:57:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:17,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-11-22 12:57:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:17,242 INFO L225 Difference]: With dead ends: 392 [2020-11-22 12:57:17,242 INFO L226 Difference]: Without dead ends: 208 [2020-11-22 12:57:17,244 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 [2020-11-22 12:57:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-22 12:57:17,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2020-11-22 12:57:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-11-22 12:57:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 278 transitions. [2020-11-22 12:57:17,256 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 278 transitions. Word has length 68 [2020-11-22 12:57:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:17,256 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 278 transitions. [2020-11-22 12:57:17,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 278 transitions. [2020-11-22 12:57:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-22 12:57:17,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:17,266 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:17,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:57:17,267 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:17,268 INFO L82 PathProgramCache]: Analyzing trace with hash -339337369, now seen corresponding path program 1 times [2020-11-22 12:57:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:17,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352517879] [2020-11-22 12:57:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-22 12:57:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352517879] [2020-11-22 12:57:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403632534] [2020-11-22 12:57:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:57:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-22 12:57:17,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:17,627 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 12:57:17,627 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:17,641 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 12:57:17,641 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-11-22 12:57:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826605389] [2020-11-22 12:57:17,723 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2020-11-22 12:57:17,723 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:57:17,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:57:17,733 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:57:17,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:57:18,378 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-11-22 12:57:18,734 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-11-22 12:57:19,027 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2020-11-22 12:57:19,390 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-11-22 12:57:19,709 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 247 [2020-11-22 12:57:19,957 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-11-22 12:57:20,069 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-11-22 12:57:20,258 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 223 [2020-11-22 12:57:20,664 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 273 [2020-11-22 12:57:21,054 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-11-22 12:57:21,321 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 253 [2020-11-22 12:57:21,643 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 243 [2020-11-22 12:57:22,060 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-11-22 12:57:22,207 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-22 12:57:22,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:57:22,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2020-11-22 12:57:22,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766894944] [2020-11-22 12:57:22,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:57:22,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:57:22,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:22,211 INFO L87 Difference]: Start difference. First operand 206 states and 278 transitions. Second operand 7 states. [2020-11-22 12:57:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:22,310 INFO L93 Difference]: Finished difference Result 643 states and 867 transitions. [2020-11-22 12:57:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:22,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-11-22 12:57:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:22,315 INFO L225 Difference]: With dead ends: 643 [2020-11-22 12:57:22,315 INFO L226 Difference]: Without dead ends: 641 [2020-11-22 12:57:22,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-11-22 12:57:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 580. [2020-11-22 12:57:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-11-22 12:57:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 792 transitions. [2020-11-22 12:57:22,364 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 792 transitions. Word has length 86 [2020-11-22 12:57:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:22,365 INFO L481 AbstractCegarLoop]: Abstraction has 580 states and 792 transitions. [2020-11-22 12:57:22,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:57:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 792 transitions. [2020-11-22 12:57:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-22 12:57:22,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:22,372 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:22,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:22,591 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash 197780280, now seen corresponding path program 1 times [2020-11-22 12:57:22,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:22,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402993586] [2020-11-22 12:57:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:57:22,674 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:57:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:57:22,752 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:57:22,812 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:57:22,813 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:57:22,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-11-22 12:57:22,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:57:22 BoogieIcfgContainer [2020-11-22 12:57:22,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:57:22,944 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:57:22,944 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:57:22,945 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:57:22,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:14" (3/4) ... [2020-11-22 12:57:22,947 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:57:23,086 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6a768211-e43f-4a18-a1cc-66263c2b226d/bin/utaipan/witness.graphml [2020-11-22 12:57:23,087 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:57:23,088 INFO L168 Benchmark]: Toolchain (without parser) took 10606.85 ms. Allocated memory was 86.0 MB in the beginning and 270.5 MB in the end (delta: 184.5 MB). Free memory was 55.7 MB in the beginning and 203.8 MB in the end (delta: -148.0 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,088 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 42.5 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:23,089 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.33 ms. Allocated memory is still 86.0 MB. Free memory was 55.6 MB in the beginning and 59.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,089 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.84 ms. Allocated memory is still 86.0 MB. Free memory was 59.7 MB in the beginning and 56.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,089 INFO L168 Benchmark]: Boogie Preprocessor took 70.87 ms. Allocated memory is still 86.0 MB. Free memory was 56.9 MB in the beginning and 54.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,090 INFO L168 Benchmark]: RCFGBuilder took 1499.95 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 46.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,090 INFO L168 Benchmark]: TraceAbstraction took 8271.20 ms. Allocated memory was 104.9 MB in the beginning and 270.5 MB in the end (delta: 165.7 MB). Free memory was 45.4 MB in the beginning and 216.3 MB in the end (delta: -171.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:23,091 INFO L168 Benchmark]: Witness Printer took 143.10 ms. Allocated memory is still 270.5 MB. Free memory was 216.3 MB in the beginning and 203.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:23,093 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 42.5 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 528.33 ms. Allocated memory is still 86.0 MB. Free memory was 55.6 MB in the beginning and 59.7 MB in the end (delta: -4.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 82.84 ms. Allocated memory is still 86.0 MB. Free memory was 59.7 MB in the beginning and 56.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.87 ms. Allocated memory is still 86.0 MB. Free memory was 56.9 MB in the beginning and 54.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1499.95 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 46.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8271.20 ms. Allocated memory was 104.9 MB in the beginning and 270.5 MB in the end (delta: 165.7 MB). Free memory was 45.4 MB in the beginning and 216.3 MB in the end (delta: -171.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 143.10 ms. Allocated memory is still 270.5 MB. Free memory was 216.3 MB in the beginning and 203.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 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: [L555] int s ; [L559] s = 12292 [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__bbio = __VERIFIER_nondet_int() ; [L22] int s__wbio = __VERIFIER_nondet_int() ; [L23] int s__hit = __VERIFIER_nondet_int() ; [L24] int s__rwstate ; [L25] int s__init_buf___0 = __VERIFIER_nondet_int() ; [L26] int s__debug = __VERIFIER_nondet_int() ; [L27] int s__shutdown ; [L28] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L29] int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_connect = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_hit = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_int() ; [L33] int s__s3__change_cipher_spec ; [L34] int s__s3__flags = __VERIFIER_nondet_int() ; [L35] int s__s3__delay_buf_pop_ret ; [L36] int s__s3__tmp__cert_req = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_compression = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int() ; [L43] int s__session__cipher ; [L44] int s__session__compress_meth ; [L45] int buf ; [L46] unsigned long tmp ; [L47] unsigned long l ; [L48] int num1 = __VERIFIER_nondet_int() ; [L49] int cb ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int tmp___0 ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 = __VERIFIER_nondet_int() ; [L62] int tmp___8 = __VERIFIER_nondet_int() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] long __cil_tmp57 ; [L68] long __cil_tmp58 ; [L69] long __cil_tmp59 ; [L70] long __cil_tmp60 ; [L71] long __cil_tmp61 ; [L72] long __cil_tmp62 ; [L73] long __cil_tmp63 ; [L74] long __cil_tmp64 ; [L75] long __cil_tmp65 ; [L79] s__state = initial_state [L80] blastFlag = 0 [L81] tmp = __VERIFIER_nondet_int() [L82] cb = 0 [L83] ret = -1 [L84] skip = 0 [L85] tmp___0 = 0 [L86] COND TRUE s__info_callback != 0 [L87] cb = s__info_callback [L93] s__in_handshake ++ [L94] COND FALSE !(tmp___1 + 12288) [L100] COND TRUE 1 [L102] state = s__state [L103] COND TRUE s__state == 12292 [L205] s__new_session = 1 [L206] s__state = 4096 [L207] s__ctx__stats__sess_connect_renegotiate ++ [L212] s__server = 0 [L213] COND TRUE cb != 0 [L217] __cil_tmp55 = s__version + 65280 [L218] COND FALSE !(__cil_tmp55 != 768) [L223] s__type = 4096 [L224] COND FALSE !(s__init_buf___0 == 0) [L236] COND FALSE !(! tmp___4) [L240] COND FALSE !(! tmp___5) [L244] s__state = 4368 [L245] s__ctx__stats__sess_connect ++ [L246] s__init_num = 0 [L522] COND FALSE !(! s__s3__tmp__reuse_message) [L539] 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 == 4096) [L112] COND FALSE !(s__state == 20480) [L115] COND FALSE !(s__state == 4099) [L118] COND TRUE s__state == 4368 [L250] s__shutdown = 0 [L251] ret = __VERIFIER_nondet_int() [L252] COND TRUE blastFlag == 0 [L253] blastFlag = 1 [L255] COND FALSE !(ret <= 0) [L258] s__state = 4384 [L259] s__init_num = 0 [L260] COND TRUE s__bbio != s__wbio [L522] COND FALSE !(! s__s3__tmp__reuse_message) [L539] 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 == 4096) [L112] COND FALSE !(s__state == 20480) [L115] COND FALSE !(s__state == 4099) [L118] COND FALSE !(s__state == 4368) [L121] COND FALSE !(s__state == 4369) [L124] COND TRUE s__state == 4384 [L266] ret = __VERIFIER_nondet_int() [L267] COND TRUE blastFlag == 1 [L268] blastFlag = 2 [L270] COND FALSE !(ret <= 0) [L273] COND FALSE !(\read(s__hit)) [L276] s__state = 4400 [L278] s__init_num = 0 [L522] COND FALSE !(! s__s3__tmp__reuse_message) [L539] 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 == 4096) [L112] COND FALSE !(s__state == 20480) [L115] COND FALSE !(s__state == 4099) [L118] COND FALSE !(s__state == 4368) [L121] COND FALSE !(s__state == 4369) [L124] COND FALSE !(s__state == 4384) [L127] COND FALSE !(s__state == 4385) [L130] COND TRUE s__state == 4400 [L283] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L284] COND FALSE !(__cil_tmp56 + 256UL) [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 2 [L289] blastFlag = 3 [L295] COND FALSE !(ret <= 0) [L300] s__state = 4416 [L301] s__init_num = 0 [L522] COND FALSE !(! s__s3__tmp__reuse_message) [L539] 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 == 4096) [L112] COND FALSE !(s__state == 20480) [L115] COND FALSE !(s__state == 4099) [L118] COND FALSE !(s__state == 4368) [L121] COND FALSE !(s__state == 4369) [L124] COND FALSE !(s__state == 4384) [L127] COND FALSE !(s__state == 4385) [L130] COND FALSE !(s__state == 4400) [L133] COND FALSE !(s__state == 4401) [L136] COND TRUE s__state == 4416 [L305] ret = __VERIFIER_nondet_int() [L306] COND TRUE blastFlag == 3 [L307] blastFlag = 4 [L309] COND FALSE !(ret <= 0) [L312] s__state = 4432 [L313] s__init_num = 0 [L314] COND FALSE !(! tmp___6) [L522] COND FALSE !(! s__s3__tmp__reuse_message) [L539] 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 == 4096) [L112] COND FALSE !(s__state == 20480) [L115] COND FALSE !(s__state == 4099) [L118] COND FALSE !(s__state == 4368) [L121] COND FALSE !(s__state == 4369) [L124] COND FALSE !(s__state == 4384) [L127] COND FALSE !(s__state == 4385) [L130] COND FALSE !(s__state == 4400) [L133] COND FALSE !(s__state == 4401) [L136] COND FALSE !(s__state == 4416) [L139] COND FALSE !(s__state == 4417) [L142] COND TRUE s__state == 4432 [L321] ret = __VERIFIER_nondet_int() [L322] COND TRUE blastFlag == 4 [L3] __assert_fail("0", "s3_clnt_4.cil-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 784 SDtfs, 426 SDslu, 1051 SDs, 0 SdLazy, 679 SolverSat, 138 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 292 GetRequests, 273 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=580occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 85 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 517 NumberOfCodeBlocks, 517 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 558 ConstructedInterpolants, 0 QuantifiedInterpolants, 130495 SizeOfPredicates, 4 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 313/550 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...