./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_2.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_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_2.cil-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/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 a09fdb769f8192e1aae889aa3c16faf62d88450d .................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2020-11-28 03:17:37,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:17:37,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:17:37,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:17:37,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:17:37,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:17:37,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:17:37,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:17:37,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:17:37,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:17:37,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:17:37,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:17:37,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:17:37,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:17:37,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:17:37,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:17:37,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:17:37,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:17:37,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:17:37,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:17:37,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:17:37,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:17:37,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:17:37,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:17:37,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:17:37,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:17:37,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:17:37,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:17:37,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:17:37,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:17:37,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:17:37,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:17:37,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:17:37,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:17:37,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:17:37,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:17:37,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:17:37,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:17:37,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:17:37,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:17:37,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:17:37,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:17:37,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:17:37,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:17:37,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:17:37,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:17:37,183 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:17:37,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:17:37,183 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:17:37,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:17:37,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:17:37,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:17:37,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:17:37,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:17:37,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:17:37,186 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:17:37,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:17:37,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:17:37,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:17:37,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:17:37,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:17:37,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:17:37,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:17:37,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:17:37,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:17:37,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:17:37,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:17:37,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:17:37,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:17:37,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:17:37,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:17:37,189 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_c0f19186-d7a4-4b7c-a532-c3c2c5908745/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a09fdb769f8192e1aae889aa3c16faf62d88450d [2020-11-28 03:17:37,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:17:37,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:17:37,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:17:37,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:17:37,491 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:17:37,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/../../sv-benchmarks/c/systemc/pc_sfifo_2.cil-2.c [2020-11-28 03:17:37,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/data/64715190a/f45faa98738540f28a34d537ad77f0ed/FLAG471ea4987 [2020-11-28 03:17:38,065 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:17:38,074 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/sv-benchmarks/c/systemc/pc_sfifo_2.cil-2.c [2020-11-28 03:17:38,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/data/64715190a/f45faa98738540f28a34d537ad77f0ed/FLAG471ea4987 [2020-11-28 03:17:38,408 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/data/64715190a/f45faa98738540f28a34d537ad77f0ed [2020-11-28 03:17:38,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:17:38,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:17:38,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:38,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:17:38,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:17:38,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:38,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393bfa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38, skipping insertion in model container [2020-11-28 03:17:38,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:38,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:17:38,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:17:38,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:38,800 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:17:38,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:38,905 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:17:38,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38 WrapperNode [2020-11-28 03:17:38,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:38,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:38,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:17:38,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:17:38,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:38,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:38,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:17:38,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:17:38,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:17:38,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:38,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... [2020-11-28 03:17:39,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:17:39,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:17:39,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:17:39,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:17:39,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/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 [2020-11-28 03:17:39,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:17:39,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:17:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:17:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:17:39,834 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:17:39,835 INFO L298 CfgBuilder]: Removed 66 assume(true) statements. [2020-11-28 03:17:39,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:39 BoogieIcfgContainer [2020-11-28 03:17:39,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:17:39,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:17:39,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:17:39,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:17:39,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:17:38" (1/3) ... [2020-11-28 03:17:39,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba40566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:39, skipping insertion in model container [2020-11-28 03:17:39,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:38" (2/3) ... [2020-11-28 03:17:39,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba40566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:17:39, skipping insertion in model container [2020-11-28 03:17:39,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:39" (3/3) ... [2020-11-28 03:17:39,849 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-2.c [2020-11-28 03:17:39,859 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:17:39,864 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 03:17:39,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 03:17:39,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:17:39,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:17:39,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:17:39,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:17:39,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:17:39,903 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:17:39,903 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:17:39,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:17:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-11-28 03:17:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:39,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:39,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:39,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1129554405, now seen corresponding path program 1 times [2020-11-28 03:17:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:39,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806307492] [2020-11-28 03:17:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:40,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806307492] [2020-11-28 03:17:40,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:40,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:17:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788642044] [2020-11-28 03:17:40,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:17:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:17:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:17:40,135 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 3 states. [2020-11-28 03:17:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:40,253 INFO L93 Difference]: Finished difference Result 275 states and 428 transitions. [2020-11-28 03:17:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:17:40,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-11-28 03:17:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:40,267 INFO L225 Difference]: With dead ends: 275 [2020-11-28 03:17:40,267 INFO L226 Difference]: Without dead ends: 178 [2020-11-28 03:17:40,274 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 [2020-11-28 03:17:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-28 03:17:40,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2020-11-28 03:17:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-28 03:17:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 252 transitions. [2020-11-28 03:17:40,327 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 252 transitions. Word has length 33 [2020-11-28 03:17:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:40,327 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 252 transitions. [2020-11-28 03:17:40,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:17:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 252 transitions. [2020-11-28 03:17:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:40,329 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:40,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:40,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:17:40,330 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash 875581448, now seen corresponding path program 1 times [2020-11-28 03:17:40,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:40,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597224132] [2020-11-28 03:17:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:40,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597224132] [2020-11-28 03:17:40,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:40,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:17:40,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173847923] [2020-11-28 03:17:40,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:17:40,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:40,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:17:40,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:40,447 INFO L87 Difference]: Start difference. First operand 172 states and 252 transitions. Second operand 5 states. [2020-11-28 03:17:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:40,594 INFO L93 Difference]: Finished difference Result 548 states and 803 transitions. [2020-11-28 03:17:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:17:40,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-11-28 03:17:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:40,607 INFO L225 Difference]: With dead ends: 548 [2020-11-28 03:17:40,607 INFO L226 Difference]: Without dead ends: 406 [2020-11-28 03:17:40,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:17:40,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-11-28 03:17:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 178. [2020-11-28 03:17:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-11-28 03:17:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 256 transitions. [2020-11-28 03:17:40,646 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 256 transitions. Word has length 33 [2020-11-28 03:17:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:40,646 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 256 transitions. [2020-11-28 03:17:40,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:17:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 256 transitions. [2020-11-28 03:17:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:40,650 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:40,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:40,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:17:40,650 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash 57932998, now seen corresponding path program 1 times [2020-11-28 03:17:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:40,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712752445] [2020-11-28 03:17:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:40,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712752445] [2020-11-28 03:17:40,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:40,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:17:40,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119199602] [2020-11-28 03:17:40,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:17:40,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:17:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:17:40,744 INFO L87 Difference]: Start difference. First operand 178 states and 256 transitions. Second operand 4 states. [2020-11-28 03:17:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:41,035 INFO L93 Difference]: Finished difference Result 472 states and 669 transitions. [2020-11-28 03:17:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:17:41,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-11-28 03:17:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:17:41,039 INFO L225 Difference]: With dead ends: 472 [2020-11-28 03:17:41,039 INFO L226 Difference]: Without dead ends: 335 [2020-11-28 03:17:41,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:17:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-11-28 03:17:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 248. [2020-11-28 03:17:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-11-28 03:17:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 344 transitions. [2020-11-28 03:17:41,066 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 344 transitions. Word has length 33 [2020-11-28 03:17:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:17:41,066 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 344 transitions. [2020-11-28 03:17:41,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:17:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 344 transitions. [2020-11-28 03:17:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 03:17:41,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:17:41,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:41,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:17:41,077 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:17:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 316098436, now seen corresponding path program 1 times [2020-11-28 03:17:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798283612] [2020-11-28 03:17:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:41,101 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:41,132 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:41,167 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:41,168 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:17:41,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:17:41,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:17:41 BoogieIcfgContainer [2020-11-28 03:17:41,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:17:41,275 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:17:41,275 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:17:41,276 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:17:41,276 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:39" (3/4) ... [2020-11-28 03:17:41,278 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:17:41,419 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c0f19186-d7a4-4b7c-a532-c3c2c5908745/bin/uautomizer/witness.graphml [2020-11-28 03:17:41,419 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:17:41,422 INFO L168 Benchmark]: Toolchain (without parser) took 3006.69 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 55.6 MB in the beginning and 79.8 MB in the end (delta: -24.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,423 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:41,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.23 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 62.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,424 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.46 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 60.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,425 INFO L168 Benchmark]: Boogie Preprocessor took 55.77 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 58.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,425 INFO L168 Benchmark]: RCFGBuilder took 798.63 ms. Allocated memory is still 88.1 MB. Free memory was 58.5 MB in the beginning and 64.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,428 INFO L168 Benchmark]: TraceAbstraction took 1434.30 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 63.8 MB in the beginning and 86.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,429 INFO L168 Benchmark]: Witness Printer took 144.58 ms. Allocated memory is still 119.5 MB. Free memory was 86.8 MB in the beginning and 79.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:41,433 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 491.23 ms. Allocated memory is still 88.1 MB. Free memory was 55.5 MB in the beginning and 62.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.46 ms. Allocated memory is still 88.1 MB. Free memory was 62.8 MB in the beginning and 60.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.77 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 58.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 798.63 ms. Allocated memory is still 88.1 MB. Free memory was 58.5 MB in the beginning and 64.3 MB in the end (delta: -5.8 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1434.30 ms. Allocated memory was 88.1 MB in the beginning and 119.5 MB in the end (delta: 31.5 MB). Free memory was 63.8 MB in the beginning and 86.8 MB in the end (delta: -23.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 144.58 ms. Allocated memory is still 119.5 MB. Free memory was 86.8 MB in the beginning and 79.8 MB in the end (delta: 7.0 MB). Peak memory consumption was 6.3 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: [L17] int q_buf_0 ; [L18] int q_free ; [L19] int q_read_ev ; [L20] int q_write_ev ; [L21] int q_req_up ; [L22] int q_ev ; [L43] int p_num_write ; [L44] int p_last_write ; [L45] int p_dw_st ; [L46] int p_dw_pc ; [L47] int p_dw_i ; [L48] int c_num_read ; [L49] int c_last_read ; [L50] int c_dr_st ; [L51] int c_dr_pc ; [L52] int c_dr_i ; [L156] static int a_t ; VAL [a_t=0, c_dr_i=0, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=0, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=0, q_read_ev=0, q_req_up=0, q_write_ev=0] [L458] int __retres1 ; [L444] q_free = 1 [L445] q_write_ev = 2 [L446] q_read_ev = q_write_ev [L447] p_num_write = 0 [L448] p_dw_pc = 0 [L449] p_dw_i = 1 [L450] c_num_read = 0 [L451] c_dr_pc = 0 [L452] c_dr_i = 1 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L398] int kernel_st ; [L399] int tmp ; [L403] kernel_st = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L214] COND FALSE !((int )q_req_up == 1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L229] COND TRUE (int )p_dw_i == 1 [L230] p_dw_st = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L234] COND TRUE (int )c_dr_i == 1 [L235] c_dr_st = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L267] COND FALSE !((int )q_read_ev == 0) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L272] COND FALSE !((int )q_write_ev == 0) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L300] int tmp ; [L301] int tmp___0 ; [L54] int __retres1 ; VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L57] COND FALSE !((int )p_dw_pc == 1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L67] __retres1 = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L69] return (__retres1); VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L305] tmp = is_do_write_p_triggered() [L307] COND FALSE !(\read(tmp)) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L73] int __retres1 ; VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L76] COND FALSE !((int )c_dr_pc == 1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L86] __retres1 = 0 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L88] return (__retres1); VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L313] tmp___0 = is_do_read_c_triggered() [L315] COND FALSE !(\read(tmp___0)) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L285] COND FALSE !((int )q_read_ev == 1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L290] COND FALSE !((int )q_write_ev == 1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L411] COND TRUE 1 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L414] kernel_st = 1 [L325] int tmp ; [L326] int tmp___0 ; [L327] int tmp___1 ; VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L331] COND TRUE 1 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L244] int __retres1 ; VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L247] COND TRUE (int )p_dw_st == 0 [L248] __retres1 = 1 VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L260] return (__retres1); VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L334] tmp___1 = exists_runnable_thread() [L336] COND TRUE \read(tmp___1) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L341] COND TRUE (int )p_dw_st == 0 [L343] tmp = __VERIFIER_nondet_int() [L345] COND FALSE !(\read(tmp)) VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] [L3] __assert_fail("0", "pc_sfifo_2.cil-2.c", 3, "reach_error") VAL [a_t=0, c_dr_i=1, c_dr_pc=0, c_dr_st=0, c_last_read=0, c_num_read=0, p_dw_i=1, p_dw_pc=0, p_dw_st=0, p_last_write=0, p_num_write=0, q_buf_0=0, q_ev=0, q_free=1, q_read_ev=2, q_req_up=0, q_write_ev=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 429 SDtfs, 833 SDslu, 864 SDs, 0 SdLazy, 103 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=248occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 321 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 4896 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...