/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=0.2 --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 04:23:21,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:23:21,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:23:21,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:23:22,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:23:22,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:23:22,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:23:22,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:23:22,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:23:22,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:23:22,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:23:22,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:23:22,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:23:22,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:23:22,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:23:22,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:23:22,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:23:22,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:23:22,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:23:22,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:23:22,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:23:22,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:23:22,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:23:22,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:23:22,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:23:22,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:23:22,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:23:22,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:23:22,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:23:22,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:23:22,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:23:22,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:23:22,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:23:22,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:23:22,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:23:22,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:23:22,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:23:22,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:23:22,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:23:22,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:23:22,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:23:22,085 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 04:23:22,135 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:23:22,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:23:22,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:23:22,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:23:22,138 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:23:22,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:23:22,139 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:23:22,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:23:22,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:23:22,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:23:22,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:23:22,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:23:22,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:23:22,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:23:22,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:23:22,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:23:22,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:23:22,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:23:22,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:23:22,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:23:22,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:23:22,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:23:22,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:23:22,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:23:22,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:23:22,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:23:22,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:23:22,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:23:22,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:23:22,145 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:23:22,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:23:22,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:23:22,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:23:22,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:23:22,643 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:23:22,644 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-25 04:23:22,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ab14a72/43c03b5674194148a41251b720f8cf0e/FLAG44b9e10b0 [2020-09-25 04:23:23,287 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:23:23,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-25 04:23:23,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ab14a72/43c03b5674194148a41251b720f8cf0e/FLAG44b9e10b0 [2020-09-25 04:23:23,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/37ab14a72/43c03b5674194148a41251b720f8cf0e [2020-09-25 04:23:23,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:23:23,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:23:23,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:23,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:23:23,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:23:23,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:23,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23, skipping insertion in model container [2020-09-25 04:23:23,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:23,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:23:23,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:23:23,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:23,938 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:23:23,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:23:23,977 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:23:23,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23 WrapperNode [2020-09-25 04:23:23,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:23:23,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:23:23,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:23:23,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:23:24,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (1/1) ... [2020-09-25 04:23:24,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:23:24,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:23:24,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:23:24,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:23:24,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (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 04:23:24,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:23:24,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:23:24,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:23:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:23:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:23:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:23:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:23:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:23:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:23:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:23:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:23:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:23:24,519 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:23:24,519 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 04:23:24,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:24 BoogieIcfgContainer [2020-09-25 04:23:24,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:23:24,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:23:24,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:23:24,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:23:24,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:23:23" (1/3) ... [2020-09-25 04:23:24,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a137c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:24, skipping insertion in model container [2020-09-25 04:23:24,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:23:23" (2/3) ... [2020-09-25 04:23:24,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a137c48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:23:24, skipping insertion in model container [2020-09-25 04:23:24,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:23:24" (3/3) ... [2020-09-25 04:23:24,536 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-09-25 04:23:24,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:23:24,559 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:23:24,580 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:23:24,609 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:23:24,609 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:23:24,609 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:23:24,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:23:24,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:23:24,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:23:24,610 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:23:24,610 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:23:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-25 04:23:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 04:23:24,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:24,643 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 04:23:24,643 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times [2020-09-25 04:23:24,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:24,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769798146] [2020-09-25 04:23:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:24,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:25,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:25,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:25,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 04:23:25,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 04:23:25,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-09-25 04:23:25,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:25,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:23:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-25 04:23:25,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 04:23:25,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:23:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:25,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:25,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:25,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:25,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:25,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:23:25,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:25,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:25,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:25,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:25,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:25,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:25,710 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 04:23:25,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769798146] [2020-09-25 04:23:25,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:23:25,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:23:25,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134843468] [2020-09-25 04:23:25,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:23:25,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:23:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:23:25,742 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-09-25 04:23:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:25,885 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-09-25 04:23:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:23:25,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-25 04:23:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:25,901 INFO L225 Difference]: With dead ends: 57 [2020-09-25 04:23:25,901 INFO L226 Difference]: Without dead ends: 32 [2020-09-25 04:23:25,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:23:25,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-25 04:23:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-25 04:23:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 04:23:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-25 04:23:25,953 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-09-25 04:23:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:25,953 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-25 04:23:25,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:23:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-25 04:23:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 04:23:25,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:25,955 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 04:23:25,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:23:25,956 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:25,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash -403696930, now seen corresponding path program 1 times [2020-09-25 04:23:25,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:25,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923913778] [2020-09-25 04:23:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:25,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:26,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:26,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 04:23:26,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:23:26,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-09-25 04:23:26,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:26,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:23:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 04:23:26,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 04:23:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:27,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:23:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:23:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:23:27,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:23:27,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:23:27,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:23:27,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:23:27,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:23:27,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:23:27,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:23:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:23:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:23:27,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:23:27,068 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 04:23:27,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923913778] [2020-09-25 04:23:27,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:23:27,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:23:27,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543455382] [2020-09-25 04:23:27,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:23:27,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:23:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:23:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:23:27,085 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-09-25 04:23:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:23:27,273 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 04:23:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 04:23:27,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 04:23:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:23:27,275 INFO L225 Difference]: With dead ends: 41 [2020-09-25 04:23:27,276 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 04:23:27,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:23:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 04:23:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 04:23:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 04:23:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-09-25 04:23:27,285 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-09-25 04:23:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:23:27,285 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-09-25 04:23:27,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:23:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-09-25 04:23:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 04:23:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:23:27,288 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 04:23:27,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:23:27,288 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:23:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:23:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times [2020-09-25 04:23:27,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:23:27,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266390990] [2020-09-25 04:23:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:23:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:23:27,307 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:23:27,308 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:23:27,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:23:27,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:23:27 BoogieIcfgContainer [2020-09-25 04:23:27,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:23:27,340 INFO L168 Benchmark]: Toolchain (without parser) took 3691.57 ms. Allocated memory was 139.5 MB in the beginning and 235.9 MB in the end (delta: 96.5 MB). Free memory was 103.2 MB in the beginning and 103.5 MB in the end (delta: -343.7 kB). Peak memory consumption was 96.1 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,341 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.35 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,343 INFO L168 Benchmark]: Boogie Preprocessor took 120.01 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,344 INFO L168 Benchmark]: RCFGBuilder took 425.30 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,345 INFO L168 Benchmark]: TraceAbstraction took 2809.83 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 163.2 MB in the beginning and 103.5 MB in the end (delta: 59.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 7.1 GB. [2020-09-25 04:23:27,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.35 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.01 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.30 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 163.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2809.83 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 163.2 MB in the beginning and 103.5 MB in the end (delta: 59.7 MB). Peak memory consumption was 93.2 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: 2.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 43 SDslu, 96 SDs, 0 SdLazy, 111 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3204 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...