/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:15:12,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:15:12,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:15:12,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 02:15:12,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 02:15:12,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 02:15:12,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 02:15:12,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 02:15:12,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 02:15:12,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 02:15:12,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 02:15:12,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 02:15:12,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:15:12,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:15:12,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:15:12,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:15:12,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:15:12,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:15:12,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:15:12,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:15:12,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:15:12,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:15:12,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:15:12,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:15:12,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 02:15:12,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 02:15:12,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 02:15:12,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 02:15:12,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 02:15:12,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 02:15:12,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 02:15:12,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 02:15:12,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 02:15:12,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 02:15:12,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 02:15:12,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 02:15:12,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 02:15:12,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 02:15:12,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:15:12,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:15:12,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:15:12,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:15:13,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:15:13,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:15:13,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:15:13,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:15:13,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:15:13,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:15:13,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:15:13,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:15:13,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:15:13,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:15:13,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:15:13,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:15:13,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:15:13,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:15:13,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:15:13,013 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:15:13,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:15:13,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:15:13,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:15:13,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:15:13,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:15:13,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:15:13,014 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:15:13,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:15:13,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:15:13,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:15:13,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:15:13,521 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:15:13,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c [2020-11-07 02:15:13,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb102c4c/5be53494593644c3aea448d3a31daeb1/FLAG1b92ebb82 [2020-11-07 02:15:14,364 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:15:14,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c [2020-11-07 02:15:14,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb102c4c/5be53494593644c3aea448d3a31daeb1/FLAG1b92ebb82 [2020-11-07 02:15:14,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb102c4c/5be53494593644c3aea448d3a31daeb1 [2020-11-07 02:15:14,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:15:14,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:15:14,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:15:14,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:15:14,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:15:14,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:14" (1/1) ... [2020-11-07 02:15:14,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47293faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:14, skipping insertion in model container [2020-11-07 02:15:14,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:15:14" (1/1) ... [2020-11-07 02:15:14,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:15:14,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:15:15,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:15:15,024 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:15:15,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:15:15,092 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:15:15,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15 WrapperNode [2020-11-07 02:15:15,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:15:15,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:15:15,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:15:15,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:15:15,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... [2020-11-07 02:15:15,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:15:15,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:15:15,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:15:15,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:15:15,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-11-07 02:15:15,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:15:15,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:15:15,244 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:15:15,244 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-11-07 02:15:15,244 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2020-11-07 02:15:15,244 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2020-11-07 02:15:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2020-11-07 02:15:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2020-11-07 02:15:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2020-11-07 02:15:15,245 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-11-07 02:15:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-11-07 02:15:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-11-07 02:15:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-11-07 02:15:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-11-07 02:15:15,246 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-11-07 02:15:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:15:15,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:15:15,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:15:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:15:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:15:15,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:15:15,249 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-11-07 02:15:15,252 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2020-11-07 02:15:15,252 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2020-11-07 02:15:15,253 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2020-11-07 02:15:15,253 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2020-11-07 02:15:15,253 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2020-11-07 02:15:15,253 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-11-07 02:15:15,253 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-11-07 02:15:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-11-07 02:15:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-11-07 02:15:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-11-07 02:15:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-11-07 02:15:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:15:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:15:15,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:15:15,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:15:15,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:15:15,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:15:15,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:15:16,219 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:15:16,220 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-07 02:15:16,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:16 BoogieIcfgContainer [2020-11-07 02:15:16,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:15:16,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:15:16,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:15:16,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:15:16,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:15:14" (1/3) ... [2020-11-07 02:15:16,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e56e333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:16, skipping insertion in model container [2020-11-07 02:15:16,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:15:15" (2/3) ... [2020-11-07 02:15:16,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e56e333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:15:16, skipping insertion in model container [2020-11-07 02:15:16,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:15:16" (3/3) ... [2020-11-07 02:15:16,238 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-1.c [2020-11-07 02:15:16,258 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:15:16,264 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:15:16,280 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:15:16,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:15:16,324 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:15:16,324 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:15:16,324 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:15:16,324 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:15:16,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:15:16,325 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:15:16,325 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:15:16,354 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states. [2020-11-07 02:15:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 02:15:16,372 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:16,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:16,373 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 849713103, now seen corresponding path program 1 times [2020-11-07 02:15:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:16,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553120652] [2020-11-07 02:15:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:16,477 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:16,836 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-11-07 02:15:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:15:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:16,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-07 02:15:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:17,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-11-07 02:15:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:17,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-11-07 02:15:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:15:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:15:17,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553120652] [2020-11-07 02:15:17,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:15:17,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 02:15:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475802191] [2020-11-07 02:15:17,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 02:15:17,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:15:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 02:15:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-07 02:15:17,239 INFO L87 Difference]: Start difference. First operand 195 states. Second operand 7 states. [2020-11-07 02:15:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:15:19,090 INFO L93 Difference]: Finished difference Result 417 states and 535 transitions. [2020-11-07 02:15:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-07 02:15:19,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-11-07 02:15:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:15:19,111 INFO L225 Difference]: With dead ends: 417 [2020-11-07 02:15:19,111 INFO L226 Difference]: Without dead ends: 262 [2020-11-07 02:15:19,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-11-07 02:15:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-07 02:15:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2020-11-07 02:15:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-07 02:15:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2020-11-07 02:15:19,233 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 77 [2020-11-07 02:15:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:15:19,234 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2020-11-07 02:15:19,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 02:15:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2020-11-07 02:15:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-07 02:15:19,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:15:19,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:15:19,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:15:19,239 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:15:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:15:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1263540369, now seen corresponding path program 1 times [2020-11-07 02:15:19,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:15:19,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986130382] [2020-11-07 02:15:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:15:19,244 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:15:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:15:19,311 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:15:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:15:19,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:15:19,427 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:15:19,427 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:15:19,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:15:19,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:15:19 BoogieIcfgContainer [2020-11-07 02:15:19,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:15:19,461 INFO L168 Benchmark]: Toolchain (without parser) took 4730.18 ms. Allocated memory was 154.1 MB in the beginning and 194.0 MB in the end (delta: 39.8 MB). Free memory was 131.1 MB in the beginning and 121.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:15:19,462 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:15:19,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.41 ms. Allocated memory is still 154.1 MB. Free memory was 130.6 MB in the beginning and 118.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-07 02:15:19,467 INFO L168 Benchmark]: Boogie Preprocessor took 54.47 ms. Allocated memory is still 154.1 MB. Free memory was 118.8 MB in the beginning and 116.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:15:19,467 INFO L168 Benchmark]: RCFGBuilder took 1075.78 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 118.8 MB in the end (delta: -2.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:15:19,469 INFO L168 Benchmark]: TraceAbstraction took 3226.07 ms. Allocated memory was 154.1 MB in the beginning and 194.0 MB in the end (delta: 39.8 MB). Free memory was 118.3 MB in the beginning and 121.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. [2020-11-07 02:15:19,479 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 128.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.41 ms. Allocated memory is still 154.1 MB. Free memory was 130.6 MB in the beginning and 118.8 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 54.47 ms. Allocated memory is still 154.1 MB. Free memory was 118.8 MB in the beginning and 116.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1075.78 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 118.8 MB in the end (delta: -2.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3226.07 ms. Allocated memory was 154.1 MB in the beginning and 194.0 MB in the end (delta: 39.8 MB). Free memory was 118.3 MB in the beginning and 121.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 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: [L16] int q_buf_0 ; [L17] int q_free ; [L18] int q_read_ev ; [L19] int q_write_ev ; [L20] int p_num_write ; [L21] int p_last_write ; [L22] int p_dw_st ; [L23] int p_dw_pc ; [L24] int p_dw_i ; [L25] int c_num_read ; [L26] int c_last_read ; [L27] int c_dr_st ; [L28] int c_dr_pc ; [L29] int c_dr_i ; [L136] static int a_t ; [L352] int __retres1 ; [L356] CALL init_model() [L338] q_free = 1 [L339] q_write_ev = 2 [L340] q_read_ev = q_write_ev [L341] p_num_write = 0 [L342] p_dw_pc = 0 [L343] p_dw_i = 1 [L344] c_num_read = 0 [L345] c_dr_pc = 0 [L346] c_dr_i = 1 [L356] RET init_model() [L357] CALL start_simulation() [L306] int kernel_st ; [L307] int tmp ; [L311] kernel_st = 0 [L312] CALL init_threads() [L198] COND TRUE (int )p_dw_i == 1 [L199] p_dw_st = 0 [L203] COND TRUE (int )c_dr_i == 1 [L204] c_dr_st = 0 [L312] RET init_threads() [L315] COND TRUE 1 [L318] kernel_st = 1 [L319] CALL eval() [L233] int tmp ; [L234] int tmp___0 ; [L235] int tmp___1 ; [L239] COND TRUE 1 [L242] CALL, EXPR exists_runnable_thread() [L213] int __retres1 ; [L216] COND TRUE (int )p_dw_st == 0 [L217] __retres1 = 1 [L229] return (__retres1); [L242] RET, EXPR exists_runnable_thread() [L242] tmp___1 = exists_runnable_thread() [L244] COND TRUE \read(tmp___1) [L249] COND TRUE (int )p_dw_st == 0 [L251] tmp = __VERIFIER_nondet_int() [L253] COND FALSE !(\read(tmp)) [L259] CALL error() [L11] CALL reach_error() [L3] __assert_fail("0", "pc_sfifo_1.cil-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 195 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 444 SDslu, 136 SDs, 0 SdLazy, 507 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=0, 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, 1 MinimizatonAttempts, 81 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...