/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:25:37,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:25:37,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:25:37,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:25:37,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:25:37,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:25:37,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:25:37,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:25:37,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:25:37,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:25:37,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:25:37,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:25:37,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:25:37,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:25:37,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:25:37,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:25:37,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:25:37,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:25:37,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:25:37,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:25:37,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:25:37,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:25:37,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:25:37,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:25:37,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:25:37,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:25:37,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:25:37,547 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:25:37,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:25:37,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:25:37,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:25:37,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:25:37,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:25:37,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:25:37,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:25:37,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:25:37,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:25:37,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:25:37,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:25:37,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:25:37,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:25:37,565 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 [2020-09-25 05:25:37,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:25:37,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:25:37,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:25:37,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:25:37,625 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:25:37,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:25:37,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:25:37,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:25:37,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:25:37,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:25:37,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:25:37,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:25:37,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:25:37,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:25:37,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:25:37,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:25:37,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:25:37,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:25:37,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:25:37,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:25:37,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:25:37,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:25:37,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:25:37,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:25:37,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:25:37,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:25:37,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:25:37,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:25:37,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:25:37,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=0.4;log-additional-information=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=0.4;log-additional-information=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=0.4;log-additional-information=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=0.4;log-additional-information=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=0.4;log-additional-information=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=0.4;log-additional-information=true; [2020-09-25 05:25:38,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:25:38,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:25:38,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:25:38,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:25:38,140 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:25:38,141 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 05:25:38,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56cb54d9b/c28af0d4900541afa22c418d85f3c59e/FLAG821514d90 [2020-09-25 05:25:38,777 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:25:38,778 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-09-25 05:25:38,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56cb54d9b/c28af0d4900541afa22c418d85f3c59e/FLAG821514d90 [2020-09-25 05:25:39,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56cb54d9b/c28af0d4900541afa22c418d85f3c59e [2020-09-25 05:25:39,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:25:39,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:25:39,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:25:39,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:25:39,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:25:39,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b51621b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39, skipping insertion in model container [2020-09-25 05:25:39,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:25:39,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:25:39,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:25:39,410 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:25:39,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:25:39,446 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:25:39,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39 WrapperNode [2020-09-25 05:25:39,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:25:39,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:25:39,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:25:39,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:25:39,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (1/1) ... [2020-09-25 05:25:39,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:25:39,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:25:39,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:25:39,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:25:39,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (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 [2020-09-25 05:25:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:25:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:25:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-09-25 05:25:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:25:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:25:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:25:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-09-25 05:25:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:25:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:25:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:25:39,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:25:39,879 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:25:39,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:25:39 BoogieIcfgContainer [2020-09-25 05:25:39,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:25:39,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:25:39,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:25:39,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:25:39,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:25:39" (1/3) ... [2020-09-25 05:25:39,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35af213a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:25:39, skipping insertion in model container [2020-09-25 05:25:39,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:25:39" (2/3) ... [2020-09-25 05:25:39,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35af213a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:25:39, skipping insertion in model container [2020-09-25 05:25:39,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:25:39" (3/3) ... [2020-09-25 05:25:39,914 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-09-25 05:25:39,942 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:25:39,953 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:25:39,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:25:40,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:25:40,023 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:25:40,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:25:40,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:25:40,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:25:40,024 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:25:40,024 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:25:40,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:25:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-25 05:25:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 05:25:40,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:25:40,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:25:40,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:25:40,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:25:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash 31169137, now seen corresponding path program 1 times [2020-09-25 05:25:40,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:25:40,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825322577] [2020-09-25 05:25:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:25:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:40,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:40,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:40,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:40,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 05:25:40,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:25:40,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-09-25 05:25:40,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:40,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:25:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 05:25:40,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 05:25:40,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 05:25:40,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:25:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:41,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:41,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 05:25:41,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:41,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:25:41,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:41,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:25:41,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:25:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-25 05:25:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:41,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:41,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:41,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 05:25:41,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:25:41,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 05:25:41,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:41,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:41,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:25:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:41,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 05:25:41,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:41,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 05:25:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:25:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:41,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:25:41,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:25:41,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 05:25:41,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:25:41,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 05:25:41,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:25:41,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:25:41,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:25:41,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:25:41,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 05:25:41,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:25:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:25:41,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825322577] [2020-09-25 05:25:41,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:25:41,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 05:25:41,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310474490] [2020-09-25 05:25:41,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 05:25:41,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:25:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 05:25:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:25:41,167 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-09-25 05:25:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:25:41,338 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-09-25 05:25:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 05:25:41,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-25 05:25:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:25:41,355 INFO L225 Difference]: With dead ends: 51 [2020-09-25 05:25:41,355 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 05:25:41,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 05:25:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 05:25:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-25 05:25:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-25 05:25:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-25 05:25:41,443 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2020-09-25 05:25:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:25:41,444 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-25 05:25:41,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 05:25:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-25 05:25:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 05:25:41,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:25:41,452 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:25:41,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:25:41,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:25:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:25:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 812451921, now seen corresponding path program 1 times [2020-09-25 05:25:41,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:25:41,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729293461] [2020-09-25 05:25:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:25:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:25:41,508 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:25:41,509 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:25:41,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:25:41,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:25:41 BoogieIcfgContainer [2020-09-25 05:25:41,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:25:41,578 INFO L168 Benchmark]: Toolchain (without parser) took 2451.47 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 99.2 MB in the beginning and 97.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,581 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.94 ms. Allocated memory is still 144.2 MB. Free memory was 98.6 MB in the beginning and 89.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,591 INFO L168 Benchmark]: Boogie Preprocessor took 30.17 ms. Allocated memory is still 144.2 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,593 INFO L168 Benchmark]: RCFGBuilder took 409.26 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 87.5 MB in the beginning and 168.6 MB in the end (delta: -81.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,595 INFO L168 Benchmark]: TraceAbstraction took 1672.22 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 97.6 MB in the end (delta: 70.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:25:41,601 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.94 ms. Allocated memory is still 144.2 MB. Free memory was 98.6 MB in the beginning and 89.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.17 ms. Allocated memory is still 144.2 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.26 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 87.5 MB in the beginning and 168.6 MB in the end (delta: -81.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1672.22 ms. Allocated memory is still 201.3 MB. Free memory was 168.0 MB in the beginning and 97.6 MB in the end (delta: 70.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; [L28] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L28] RET A(g,h) [L29] CALL A(g,h) [L17] COND TRUE \read(a1) [L18] CALL A(a2,a1) [L17] COND FALSE !(\read(a1)) [L20] g = a2 [L18] RET A(a2,a1) [L29] RET A(g,h) [L30] COND TRUE \read(g) [L31] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 22 SDslu, 65 SDs, 0 SdLazy, 40 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 1848 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 1/6 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...