/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:13:08,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:13:08,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:13:08,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:13:08,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:13:08,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:13:08,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:13:08,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:13:08,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:13:08,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:13:08,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:13:08,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:13:08,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:13:08,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:13:08,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:13:08,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:13:08,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:13:08,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:13:08,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:13:08,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:13:08,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:13:08,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:13:08,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:13:08,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:13:08,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:13:08,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:13:08,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:13:08,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:13:08,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:13:08,245 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:13:08,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:13:08,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:13:08,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:13:08,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:13:08,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:13:08,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:13:08,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:13:08,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:13:08,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:13:08,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:13:08,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:13:08,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 17:13:08,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:13:08,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:13:08,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:13:08,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:13:08,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:13:08,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:13:08,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:13:08,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:13:08,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:13:08,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:13:08,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:13:08,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:13:08,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:13:08,322 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:13:08,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:13:08,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:13:08,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:13:08,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:13:08,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:13:08,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:13:08,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:13:08,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:13:08,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:13:08,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:13:08,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:13:08,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:13:08,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:13:08,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:13:08,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:13:08,326 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:/storage/repos/ultimate-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:13:08,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:13:08,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:13:08,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:13:08,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:13:08,731 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:13:08,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-28 17:13:08,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1af39c81b/76667d82ad0e442da9554b4ee412ba41/FLAG123b7de0f [2020-10-28 17:13:09,496 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:13:09,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-28 17:13:09,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1af39c81b/76667d82ad0e442da9554b4ee412ba41/FLAG123b7de0f [2020-10-28 17:13:09,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1af39c81b/76667d82ad0e442da9554b4ee412ba41 [2020-10-28 17:13:09,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:13:09,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:13:09,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:13:09,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:13:09,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:13:09,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:13:09" (1/1) ... [2020-10-28 17:13:09,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618b01bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:09, skipping insertion in model container [2020-10-28 17:13:09,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:13:09" (1/1) ... [2020-10-28 17:13:09,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:13:09,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:13:10,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:13:10,125 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:13:10,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:13:10,157 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:13:10,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10 WrapperNode [2020-10-28 17:13:10,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:13:10,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:13:10,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:13:10,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:13:10,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... [2020-10-28 17:13:10,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:13:10,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:13:10,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:13:10,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:13:10,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-28 17:13:10,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:13:10,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:13:10,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:13:10,264 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-28 17:13:10,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:13:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:13:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:13:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:13:10,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:13:10,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:13:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:13:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:13:10,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:13:10,494 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:13:10,494 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:13:10,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:13:10 BoogieIcfgContainer [2020-10-28 17:13:10,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:13:10,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:13:10,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:13:10,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:13:10,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:13:09" (1/3) ... [2020-10-28 17:13:10,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce756a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:13:10, skipping insertion in model container [2020-10-28 17:13:10,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:13:10" (2/3) ... [2020-10-28 17:13:10,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce756a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:13:10, skipping insertion in model container [2020-10-28 17:13:10,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:13:10" (3/3) ... [2020-10-28 17:13:10,507 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-28 17:13:10,521 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:13:10,526 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:13:10,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:13:10,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:13:10,580 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:13:10,580 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:13:10,580 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:13:10,580 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:13:10,581 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:13:10,581 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:13:10,581 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:13:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-28 17:13:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 17:13:10,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:10,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:10,611 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash 394687314, now seen corresponding path program 1 times [2020-10-28 17:13:10,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:10,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190681978] [2020-10-28 17:13:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:11,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:11,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 17:13:11,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:13:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-10-28 17:13:11,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:11,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:11,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:13:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 17:13:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 17:13:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:13:11,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:13:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:11,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:11,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:13:11,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:11,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:13:11,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:11,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:11,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:13:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:13:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:13:11,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:13:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:11,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:11,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:13:11,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:13:11,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 17:13:11,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:11,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:11,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:13:11,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:11,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:13:11,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:13:11,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 17:13:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:13:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:13:11,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:13:11,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:13:11,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:13:11,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:13:11,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:13:11,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:13:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:13:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:13:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:13:11,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:13:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 17:13:11,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190681978] [2020-10-28 17:13:11,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:13:11,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:13:11,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82236607] [2020-10-28 17:13:11,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:13:11,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:13:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:13:11,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:13:11,958 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-28 17:13:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:13:12,307 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-28 17:13:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 17:13:12,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 17:13:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:13:12,317 INFO L225 Difference]: With dead ends: 50 [2020-10-28 17:13:12,318 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 17:13:12,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:13:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 17:13:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 17:13:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 17:13:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 17:13:12,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2020-10-28 17:13:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:13:12,372 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 17:13:12,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:13:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 17:13:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 17:13:12,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:13:12,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:13:12,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:13:12,375 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:13:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:13:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash 208947422, now seen corresponding path program 1 times [2020-10-28 17:13:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:13:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911357838] [2020-10-28 17:13:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:13:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 17:13:12,396 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 17:13:12,396 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 17:13:12,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:13:12,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:13:12 BoogieIcfgContainer [2020-10-28 17:13:12,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:13:12,421 INFO L168 Benchmark]: Toolchain (without parser) took 2549.80 ms. Allocated memory was 152.0 MB in the beginning and 199.2 MB in the end (delta: 47.2 MB). Free memory was 127.0 MB in the beginning and 148.3 MB in the end (delta: -21.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2020-10-28 17:13:12,421 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 152.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:13:12,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.35 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 117.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:13:12,424 INFO L168 Benchmark]: Boogie Preprocessor took 31.76 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 17:13:12,425 INFO L168 Benchmark]: RCFGBuilder took 305.19 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 103.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:13:12,426 INFO L168 Benchmark]: TraceAbstraction took 1919.34 ms. Allocated memory was 152.0 MB in the beginning and 199.2 MB in the end (delta: 47.2 MB). Free memory was 102.7 MB in the beginning and 148.3 MB in the end (delta: -45.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:13:12,430 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 152.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.35 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 117.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.76 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.19 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 103.1 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1919.34 ms. Allocated memory was 152.0 MB in the beginning and 199.2 MB in the end (delta: 47.2 MB). Free memory was 102.7 MB in the beginning and 148.3 MB in the end (delta: -45.6 MB). Peak memory consumption was 2.6 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 g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; [L30] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L30] RET A(g,h) [L31] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L31] RET A(g,h) [L32] COND TRUE \read(g) [L33] CALL reach_error() [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 51 SDs, 0 SdLazy, 68 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1660 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 1/4 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...