/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:35:08,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:35:08,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:35:08,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:35:08,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:35:08,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:35:08,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:35:08,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:35:08,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:35:08,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:35:08,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:35:08,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:35:08,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:35:08,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:35:08,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:35:08,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:35:08,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:35:08,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:35:08,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:35:08,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:35:08,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:35:08,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:35:08,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:35:08,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:35:08,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:35:08,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:35:08,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:35:08,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:35:08,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:35:08,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:35:08,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:35:08,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:35:08,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:35:08,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:35:08,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:35:08,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:35:08,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:35:08,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:35:08,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:35:08,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:35:08,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:35:08,763 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 14:35:08,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:35:08,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:35:08,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:35:08,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:35:08,828 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:35:08,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:35:08,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:35:08,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:35:08,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:35:08,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:35:08,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:35:08,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:35:08,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:35:08,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:35:08,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:35:08,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:35:08,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:35:08,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:35:08,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:35:08,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:35:08,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:35:08,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:35:08,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:35:08,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:35:08,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:35:08,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:35:08,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:35:08,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:35:08,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:35:08,833 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:35:09,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:35:09,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:35:09,289 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:35:09,291 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:35:09,291 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:35:09,292 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-25 14:35:09,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/562f6c12a/d4e359daea714d5c89eb7c1db5fa1f88/FLAG734c0e21e [2020-09-25 14:35:09,955 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:35:09,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-25 14:35:09,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/562f6c12a/d4e359daea714d5c89eb7c1db5fa1f88/FLAG734c0e21e [2020-09-25 14:35:10,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/562f6c12a/d4e359daea714d5c89eb7c1db5fa1f88 [2020-09-25 14:35:10,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:35:10,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:35:10,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:35:10,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:35:10,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:35:10,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef7a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10, skipping insertion in model container [2020-09-25 14:35:10,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:35:10,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:35:10,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:35:10,619 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:35:10,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:35:10,660 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:35:10,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10 WrapperNode [2020-09-25 14:35:10,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:35:10,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:35:10,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:35:10,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:35:10,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (1/1) ... [2020-09-25 14:35:10,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:35:10,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:35:10,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:35:10,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:35:10,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (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 [2020-09-25 14:35:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:35:10,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:35:10,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:35:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:35:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:35:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:35:10,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 14:35:10,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 14:35:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 14:35:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:35:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:35:10,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:35:11,218 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:35:11,218 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:35:11,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:35:11 BoogieIcfgContainer [2020-09-25 14:35:11,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:35:11,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:35:11,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:35:11,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:35:11,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:35:10" (1/3) ... [2020-09-25 14:35:11,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9748b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:35:11, skipping insertion in model container [2020-09-25 14:35:11,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:35:10" (2/3) ... [2020-09-25 14:35:11,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e9748b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:35:11, skipping insertion in model container [2020-09-25 14:35:11,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:35:11" (3/3) ... [2020-09-25 14:35:11,236 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-09-25 14:35:11,247 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:35:11,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:35:11,277 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:35:11,314 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:35:11,314 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:35:11,315 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:35:11,315 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:35:11,315 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:35:11,315 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:35:11,315 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:35:11,315 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:35:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-25 14:35:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 14:35:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:35:11,347 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] [2020-09-25 14:35:11,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:35:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:35:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times [2020-09-25 14:35:11,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:35:11,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431761813] [2020-09-25 14:35:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:35:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:35:11,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:11,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:11,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:12,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:35:12,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:35:12,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 14:35:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-09-25 14:35:12,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:35:12,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:35:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:35:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 14:35:12,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 14:35:12,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:35:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:35:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:35:12,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:12,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:35:12,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:35:12,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:35:12,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 14:35:12,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:35:12,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:35:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:35:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:35:12,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:35:12,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:35:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:35:12,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431761813] [2020-09-25 14:35:12,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:35:12,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 14:35:12,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287922397] [2020-09-25 14:35:12,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:35:12,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:35:12,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:35:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:35:12,614 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 6 states. [2020-09-25 14:35:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:35:12,890 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-09-25 14:35:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 14:35:12,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-09-25 14:35:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:35:12,906 INFO L225 Difference]: With dead ends: 88 [2020-09-25 14:35:12,906 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 14:35:12,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:35:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 14:35:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-09-25 14:35:12,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 14:35:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-09-25 14:35:12,959 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2020-09-25 14:35:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:35:12,960 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-09-25 14:35:12,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:35:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-09-25 14:35:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 14:35:12,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:35:12,961 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] [2020-09-25 14:35:12,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:35:12,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:35:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:35:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1844949599, now seen corresponding path program 1 times [2020-09-25 14:35:12,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:35:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547021027] [2020-09-25 14:35:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:35:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:35:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:13,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:35:13,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 14:35:13,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 14:35:13,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-09-25 14:35:13,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:35:13,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:35:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 14:35:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 14:35:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:35:13,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:35:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:35:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:35:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:35:13,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:35:13,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:35:13,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:35:13,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:35:13,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:35:13,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:35:13,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:35:13,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:35:13,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:35:13,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:35:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:35:13,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547021027] [2020-09-25 14:35:13,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:35:13,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 14:35:13,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952589462] [2020-09-25 14:35:13,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:35:13,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:35:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:35:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:35:13,460 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 7 states. [2020-09-25 14:35:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:35:13,592 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-09-25 14:35:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 14:35:13,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 14:35:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:35:13,594 INFO L225 Difference]: With dead ends: 55 [2020-09-25 14:35:13,595 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 14:35:13,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:35:13,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 14:35:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-09-25 14:35:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 14:35:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-09-25 14:35:13,602 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2020-09-25 14:35:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:35:13,603 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-09-25 14:35:13,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:35:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-09-25 14:35:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 14:35:13,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:35:13,605 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] [2020-09-25 14:35:13,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:35:13,605 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:35:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:35:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times [2020-09-25 14:35:13,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:35:13,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052732146] [2020-09-25 14:35:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:35:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:35:13,624 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:35:13,624 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:35:13,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:35:13,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:35:13 BoogieIcfgContainer [2020-09-25 14:35:13,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:35:13,655 INFO L168 Benchmark]: Toolchain (without parser) took 3344.77 ms. Allocated memory was 141.0 MB in the beginning and 234.9 MB in the end (delta: 93.8 MB). Free memory was 103.7 MB in the beginning and 125.7 MB in the end (delta: -22.0 MB). Peak memory consumption was 71.8 MB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,656 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.06 ms. Allocated memory is still 141.0 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,658 INFO L168 Benchmark]: Boogie Preprocessor took 118.80 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,659 INFO L168 Benchmark]: RCFGBuilder took 443.24 ms. Allocated memory is still 204.5 MB. Free memory was 182.3 MB in the beginning and 165.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,660 INFO L168 Benchmark]: TraceAbstraction took 2426.54 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 165.3 MB in the beginning and 125.7 MB in the end (delta: 39.5 MB). Peak memory consumption was 70.0 MB. Max. memory is 7.1 GB. [2020-09-25 14:35:13,664 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 345.06 ms. Allocated memory is still 141.0 MB. Free memory was 103.1 MB in the beginning and 93.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.80 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.2 MB in the beginning and 182.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 443.24 ms. Allocated memory is still 204.5 MB. Free memory was 182.3 MB in the beginning and 165.9 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2426.54 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 165.3 MB in the beginning and 125.7 MB in the end (delta: 39.5 MB). Peak memory consumption was 70.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; [L14] int n = __VERIFIER_nondet_int(); [L15] EXPR n ? &d1 : &d2 [L15] union dummy *pd = n ? &d1 : &d2; [L16] d1.a = __VERIFIER_nondet_int() [L17] COND FALSE !(pd == &d1) [L20] pd->b = 0 [L22] pd == &d2 && d1.a != 0 [L22] EXPR d1.a [L22] pd == &d2 && d1.a != 0 [L22] COND TRUE pd == &d2 && d1.a != 0 [L28] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 67 SDslu, 174 SDs, 0 SdLazy, 168 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 2 MinimizatonAttempts, 16 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 4238 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...