./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.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_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/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 f919edf50b278085ea884360d609205059ef996b ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:15:37,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:15:37,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:15:37,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:15:37,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:15:37,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:15:37,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:15:37,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:15:37,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:15:37,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:15:37,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:15:37,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:15:37,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:15:37,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:15:37,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:15:37,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:15:37,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:15:37,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:15:37,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:15:37,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:15:37,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:15:37,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:15:37,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:15:37,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:15:37,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:15:37,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:15:37,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:15:37,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:15:37,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:15:37,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:15:37,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:15:37,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:15:37,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:15:37,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:15:37,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:15:37,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:15:37,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:15:37,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:15:37,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:15:37,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:15:37,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:15:37,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:15:37,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:15:37,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:15:37,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:15:37,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:15:37,228 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:15:37,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:15:37,229 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:15:37,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:15:37,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:15:37,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:15:37,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:15:37,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:15:37,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:15:37,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:15:37,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:15:37,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:15:37,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:15:37,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:15:37,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:15:37,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:15:37,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:15:37,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:15:37,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:15:37,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:15:37,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:15:37,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:15:37,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:15:37,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:15:37,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:15:37,239 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_eb367b73-b2c8-458b-8953-1c3761364845/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f919edf50b278085ea884360d609205059ef996b [2020-11-30 00:15:37,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:15:37,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:15:37,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:15:37,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:15:37,628 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:15:37,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-30 00:15:37,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/data/0de634710/62fcfe03da844b34a6e524d3fbe7b8b9/FLAG6bc841ba3 [2020-11-30 00:15:38,396 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:15:38,396 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/sv-benchmarks/c/recursive-simple/id_b3_o2-2.c [2020-11-30 00:15:38,409 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/data/0de634710/62fcfe03da844b34a6e524d3fbe7b8b9/FLAG6bc841ba3 [2020-11-30 00:15:38,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/data/0de634710/62fcfe03da844b34a6e524d3fbe7b8b9 [2020-11-30 00:15:38,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:15:38,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:15:38,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:38,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:15:38,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:15:38,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:38" (1/1) ... [2020-11-30 00:15:38,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7af5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:38, skipping insertion in model container [2020-11-30 00:15:38,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:15:38" (1/1) ... [2020-11-30 00:15:38,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:15:38,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:15:39,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:39,020 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:15:39,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:15:39,055 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:15:39,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39 WrapperNode [2020-11-30 00:15:39,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:15:39,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:15:39,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:15:39,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:15:39,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:15:39,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:15:39,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:15:39,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:15:39,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... [2020-11-30 00:15:39,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:15:39,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:15:39,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:15:39,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:15:39,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/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 [2020-11-30 00:15:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:15:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:15:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:15:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-30 00:15:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-30 00:15:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:15:39,489 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:15:39,490 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:15:39,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:39 BoogieIcfgContainer [2020-11-30 00:15:39,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:15:39,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:15:39,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:15:39,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:15:39,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:15:38" (1/3) ... [2020-11-30 00:15:39,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769634da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:15:39, skipping insertion in model container [2020-11-30 00:15:39,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:15:39" (2/3) ... [2020-11-30 00:15:39,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769634da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:15:39, skipping insertion in model container [2020-11-30 00:15:39,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:39" (3/3) ... [2020-11-30 00:15:39,527 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-11-30 00:15:39,539 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:15:39,543 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:15:39,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:15:39,582 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:15:39,583 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:15:39,583 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:15:39,583 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:15:39,583 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:15:39,583 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:15:39,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:15:39,584 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:15:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-30 00:15:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:15:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:39,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:39,608 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:15:39,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:39,615 INFO L82 PathProgramCache]: Analyzing trace with hash -948071546, now seen corresponding path program 1 times [2020-11-30 00:15:39,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:39,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608040561] [2020-11-30 00:15:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:39,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:15:39,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608040561] [2020-11-30 00:15:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:15:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405445190] [2020-11-30 00:15:39,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:15:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:15:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:39,906 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-11-30 00:15:39,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:39,990 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-11-30 00:15:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:15:39,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:15:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:40,001 INFO L225 Difference]: With dead ends: 30 [2020-11-30 00:15:40,001 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 00:15:40,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 00:15:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 00:15:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 00:15:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-30 00:15:40,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-11-30 00:15:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:40,065 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-30 00:15:40,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:15:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-30 00:15:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:15:40,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:40,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:40,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:15:40,074 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:15:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1034741369, now seen corresponding path program 1 times [2020-11-30 00:15:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012303561] [2020-11-30 00:15:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:15:40,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012303561] [2020-11-30 00:15:40,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:40,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:15:40,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170896326] [2020-11-30 00:15:40,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:15:40,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:40,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:15:40,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:40,241 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-11-30 00:15:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:40,270 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 00:15:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:15:40,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 00:15:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:40,273 INFO L225 Difference]: With dead ends: 28 [2020-11-30 00:15:40,273 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 00:15:40,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 00:15:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-30 00:15:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:15:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-30 00:15:40,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2020-11-30 00:15:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:40,285 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-30 00:15:40,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:15:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-30 00:15:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:15:40,288 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:40,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:40,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:15:40,289 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:15:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1063370520, now seen corresponding path program 1 times [2020-11-30 00:15:40,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:40,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429114141] [2020-11-30 00:15:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:15:40,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429114141] [2020-11-30 00:15:40,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538160961] [2020-11-30 00:15:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:15:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 00:15:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:15:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:15:40,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:15:40,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-30 00:15:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599461467] [2020-11-30 00:15:40,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:15:40,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:15:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:15:40,625 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-11-30 00:15:40,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:40,715 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-30 00:15:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:15:40,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-30 00:15:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:40,718 INFO L225 Difference]: With dead ends: 24 [2020-11-30 00:15:40,718 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 00:15:40,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:15:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 00:15:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 00:15:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 00:15:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-30 00:15:40,729 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-11-30 00:15:40,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:40,730 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-30 00:15:40,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:15:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-30 00:15:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:15:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:40,736 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:40,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 00:15:40,961 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:15:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:40,962 INFO L82 PathProgramCache]: Analyzing trace with hash 758694231, now seen corresponding path program 1 times [2020-11-30 00:15:40,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:40,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459667742] [2020-11-30 00:15:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:41,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:41,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 00:15:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:15:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 00:15:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459667742] [2020-11-30 00:15:41,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:15:41,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:15:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742781619] [2020-11-30 00:15:41,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:15:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:15:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:15:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:41,160 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-11-30 00:15:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:15:41,189 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-30 00:15:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:15:41,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-30 00:15:41,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:15:41,192 INFO L225 Difference]: With dead ends: 26 [2020-11-30 00:15:41,192 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 00:15:41,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:15:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 00:15:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-11-30 00:15:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 00:15:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-30 00:15:41,204 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24 [2020-11-30 00:15:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:15:41,206 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-30 00:15:41,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:15:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-30 00:15:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 00:15:41,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:15:41,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:15:41,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:15:41,210 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:15:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:15:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 787323382, now seen corresponding path program 2 times [2020-11-30 00:15:41,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:15:41,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326668451] [2020-11-30 00:15:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:15:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:41,263 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:15:41,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:15:41,332 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:15:41,332 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:15:41,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:15:41,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:15:41 BoogieIcfgContainer [2020-11-30 00:15:41,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:15:41,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:15:41,378 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:15:41,378 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:15:41,379 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:15:39" (3/4) ... [2020-11-30 00:15:41,381 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:15:41,476 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_eb367b73-b2c8-458b-8953-1c3761364845/bin/uautomizer/witness.graphml [2020-11-30 00:15:41,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:15:41,478 INFO L168 Benchmark]: Toolchain (without parser) took 2722.06 ms. Allocated memory is still 104.9 MB. Free memory was 73.8 MB in the beginning and 40.5 MB in the end (delta: 33.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,479 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 77.6 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:15:41,480 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.46 ms. Allocated memory is still 104.9 MB. Free memory was 73.5 MB in the beginning and 82.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.7 MB in the end (delta: 955.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:15:41,482 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 80.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,482 INFO L168 Benchmark]: RCFGBuilder took 369.75 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 69.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,483 INFO L168 Benchmark]: TraceAbstraction took 1867.94 ms. Allocated memory is still 104.9 MB. Free memory was 69.1 MB in the beginning and 42.6 MB in the end (delta: 26.4 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,484 INFO L168 Benchmark]: Witness Printer took 99.28 ms. Allocated memory is still 104.9 MB. Free memory was 42.6 MB in the beginning and 40.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:15:41,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 77.6 MB. Free memory is still 42.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.46 ms. Allocated memory is still 104.9 MB. Free memory was 73.5 MB in the beginning and 82.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.45 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 81.7 MB in the end (delta: 955.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.85 ms. Allocated memory is still 104.9 MB. Free memory was 81.7 MB in the beginning and 80.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 369.75 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 69.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1867.94 ms. Allocated memory is still 104.9 MB. Free memory was 69.1 MB in the beginning and 42.6 MB in the end (delta: 26.4 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. * Witness Printer took 99.28 ms. Allocated memory is still 104.9 MB. Free memory was 42.6 MB in the beginning and 40.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) [L15] int result = id(input); [L16] COND TRUE result == 2 [L4] __assert_fail("0", "id_b3_o2-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 7 SDslu, 220 SDs, 0 SdLazy, 64 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 2274 SizeOfPredicates, 2 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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...