/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:25:03,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:25:03,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:25:03,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:25:03,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:25:03,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:25:03,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:25:03,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:25:03,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:25:03,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:25:03,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:25:03,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:25:03,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:25:03,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:25:03,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:25:03,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:25:03,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:25:03,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:25:03,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:25:03,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:25:03,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:25:03,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:25:03,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:25:03,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:25:03,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:25:03,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:25:03,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:25:03,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:25:03,195 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:25:03,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:25:03,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:25:03,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:25:03,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:25:03,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:25:03,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:25:03,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:25:03,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:25:03,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:25:03,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:25:03,229 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:25:03,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:25:03,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:25:03,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:25:03,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:25:03,230 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:25:03,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:25:03,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:25:03,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:25:03,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:25:03,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:25:03,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:25:03,231 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:25:03,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:25:03,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:25:03,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:25:03,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:25:03,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:25:03,737 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:25:03,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c [2021-02-22 02:25:03,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de156ab93/f9e96cf8b68645478c3b3b61b62f74fe/FLAG0a1ed8ffe [2021-02-22 02:25:04,508 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:25:04,511 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c [2021-02-22 02:25:04,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de156ab93/f9e96cf8b68645478c3b3b61b62f74fe/FLAG0a1ed8ffe [2021-02-22 02:25:04,811 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de156ab93/f9e96cf8b68645478c3b3b61b62f74fe [2021-02-22 02:25:04,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:25:04,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:25:04,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:25:04,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:25:04,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:25:04,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:25:04" (1/1) ... [2021-02-22 02:25:04,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f97eccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:04, skipping insertion in model container [2021-02-22 02:25:04,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:25:04" (1/1) ... [2021-02-22 02:25:04,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:25:04,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:25:05,129 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c[337,350] [2021-02-22 02:25:05,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:25:05,206 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:25:05,221 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-1.c[337,350] [2021-02-22 02:25:05,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:25:05,266 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:25:05,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05 WrapperNode [2021-02-22 02:25:05,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:25:05,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:25:05,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:25:05,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:25:05,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (1/1) ... [2021-02-22 02:25:05,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:25:05,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:25:05,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:25:05,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:25:05,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (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 [2021-02-22 02:25:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:25:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:25:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:25:05,438 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-02-22 02:25:05,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-02-22 02:25:05,439 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-02-22 02:25:05,439 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-02-22 02:25:05,439 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2021-02-22 02:25:05,440 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2021-02-22 02:25:05,441 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2021-02-22 02:25:05,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:25:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:25:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:25:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:25:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:25:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:25:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-02-22 02:25:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-02-22 02:25:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-02-22 02:25:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:25:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:25:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:25:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:25:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:25:05,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:25:06,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:25:06,099 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-02-22 02:25:06,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:06 BoogieIcfgContainer [2021-02-22 02:25:06,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:25:06,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:25:06,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:25:06,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:25:06,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:25:04" (1/3) ... [2021-02-22 02:25:06,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e70c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:06, skipping insertion in model container [2021-02-22 02:25:06,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:25:05" (2/3) ... [2021-02-22 02:25:06,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31e70c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:25:06, skipping insertion in model container [2021-02-22 02:25:06,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:25:06" (3/3) ... [2021-02-22 02:25:06,125 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-1.c [2021-02-22 02:25:06,136 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:25:06,146 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:25:06,167 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:25:06,196 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:25:06,196 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:25:06,196 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:25:06,196 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:25:06,196 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:25:06,197 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:25:06,197 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:25:06,197 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:25:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states. [2021-02-22 02:25:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-02-22 02:25:06,233 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:06,237 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] [2021-02-22 02:25:06,238 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1188193866, now seen corresponding path program 1 times [2021-02-22 02:25:06,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:06,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132081613] [2021-02-22 02:25:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:06,338 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:06,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:25:06,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:25:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:06,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-22 02:25:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:06,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:25:06,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-02-22 02:25:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:06,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:25:06,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-22 02:25:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:25:06,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:25:06,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:25:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:25:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132081613] [2021-02-22 02:25:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:25:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 02:25:06,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466665756] [2021-02-22 02:25:06,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 02:25:07,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:25:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 02:25:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:25:07,025 INFO L87 Difference]: Start difference. First operand 192 states. Second operand 7 states. [2021-02-22 02:25:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:25:08,550 INFO L93 Difference]: Finished difference Result 413 states and 530 transitions. [2021-02-22 02:25:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-22 02:25:08,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2021-02-22 02:25:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:25:08,585 INFO L225 Difference]: With dead ends: 413 [2021-02-22 02:25:08,586 INFO L226 Difference]: Without dead ends: 261 [2021-02-22 02:25:08,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-02-22 02:25:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-02-22 02:25:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 180. [2021-02-22 02:25:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-02-22 02:25:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2021-02-22 02:25:08,712 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 76 [2021-02-22 02:25:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:25:08,713 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2021-02-22 02:25:08,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 02:25:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2021-02-22 02:25:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-02-22 02:25:08,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:25:08,718 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] [2021-02-22 02:25:08,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:25:08,718 INFO L428 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:25:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:25:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash -126901590, now seen corresponding path program 1 times [2021-02-22 02:25:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:25:08,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342937849] [2021-02-22 02:25:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:25:08,724 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:25:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:25:08,776 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:25:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:25:08,807 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:25:08,886 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:25:08,886 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:25:08,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:25:08,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:25:08 BoogieIcfgContainer [2021-02-22 02:25:08,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:25:08,932 INFO L168 Benchmark]: Toolchain (without parser) took 4111.37 ms. Allocated memory was 156.2 MB in the beginning and 199.2 MB in the end (delta: 43.0 MB). Free memory was 132.1 MB in the beginning and 124.5 MB in the end (delta: 7.6 MB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:08,933 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:25:08,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.02 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 119.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:08,935 INFO L168 Benchmark]: Boogie Preprocessor took 52.88 ms. Allocated memory is still 156.2 MB. Free memory was 119.2 MB in the beginning and 117.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:08,937 INFO L168 Benchmark]: RCFGBuilder took 779.25 ms. Allocated memory is still 156.2 MB. Free memory was 117.2 MB in the beginning and 115.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:08,938 INFO L168 Benchmark]: TraceAbstraction took 2823.55 ms. Allocated memory was 156.2 MB in the beginning and 199.2 MB in the end (delta: 43.0 MB). Free memory was 114.6 MB in the beginning and 124.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:25:08,952 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 130.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 430.02 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 119.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.88 ms. Allocated memory is still 156.2 MB. Free memory was 119.2 MB in the beginning and 117.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 779.25 ms. Allocated memory is still 156.2 MB. Free memory was 117.2 MB in the beginning and 115.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2823.55 ms. Allocated memory was 156.2 MB in the beginning and 199.2 MB in the end (delta: 43.0 MB). Free memory was 114.6 MB in the beginning and 124.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 16 procedures, 195 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 166 SDtfs, 444 SDslu, 136 SDs, 0 SdLazy, 506 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred 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...