/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:19:04,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:19:04,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:19:04,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:19:04,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:19:04,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:19:04,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:19:04,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:19:04,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:19:04,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:19:04,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:19:04,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:19:04,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:19:04,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:19:04,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:19:04,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:19:04,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:19:04,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:19:04,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:19:04,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:19:04,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:19:04,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:19:04,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:19:04,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:19:04,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:19:04,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:19:04,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:19:04,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:19:04,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:19:04,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:19:04,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:19:04,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:19:04,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:19:04,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:19:04,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:19:04,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:19:04,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:19:04,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:19:04,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:19:04,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:19:04,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:19:04,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:19:04,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:19:04,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:19:04,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:19:04,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:19:04,372 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:19:04,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:19:04,372 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:19:04,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:19:04,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:19:04,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:19:04,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:19:04,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:19:04,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:19:04,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:19:04,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:19:04,376 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:19:04,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:19:04,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:19:04,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:19:04,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:19:04,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:19:04,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:19:04,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:19:04,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:19:04,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:19:04,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:19:04,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:19:04,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:19:04,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:19:04,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:19:04,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:19:04,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:19:04,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:19:04,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:19:04,864 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:19:04,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-10-29 09:19:04,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dc9945e/a5d10f5877be4c27863b7d0bdc599aa9/FLAGbada73f12 [2020-10-29 09:19:05,614 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:19:05,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test06.c [2020-10-29 09:19:05,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dc9945e/a5d10f5877be4c27863b7d0bdc599aa9/FLAGbada73f12 [2020-10-29 09:19:05,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dc9945e/a5d10f5877be4c27863b7d0bdc599aa9 [2020-10-29 09:19:05,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:19:05,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:19:05,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:19:05,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:19:05,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:19:05,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:19:05" (1/1) ... [2020-10-29 09:19:05,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2541479c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:05, skipping insertion in model container [2020-10-29 09:19:05,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:19:05" (1/1) ... [2020-10-29 09:19:05,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:19:06,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:19:06,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:19:06,189 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:19:06,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:19:06,225 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:19:06,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06 WrapperNode [2020-10-29 09:19:06,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:19:06,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:19:06,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:19:06,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:19:06,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... [2020-10-29 09:19:06,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:19:06,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:19:06,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:19:06,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:19:06,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:19:06,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:19:06,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:19:06,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:19:06,344 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-29 09:19:06,344 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-29 09:19:06,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:19:06,344 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-29 09:19:06,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-29 09:19:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:19:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-29 09:19:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:19:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:19:06,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:19:06,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:19:06,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:19:06,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:19:06,875 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:19:06,876 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 09:19:06,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:19:06 BoogieIcfgContainer [2020-10-29 09:19:06,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:19:06,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:19:06,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:19:06,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:19:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:19:05" (1/3) ... [2020-10-29 09:19:06,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f0618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:19:06, skipping insertion in model container [2020-10-29 09:19:06,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:19:06" (2/3) ... [2020-10-29 09:19:06,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f0618f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:19:06, skipping insertion in model container [2020-10-29 09:19:06,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:19:06" (3/3) ... [2020-10-29 09:19:06,891 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-10-29 09:19:06,903 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:19:06,908 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:19:06,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:19:06,967 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:19:06,967 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:19:06,968 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:19:06,968 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:19:06,968 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:19:06,968 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:19:06,968 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:19:06,968 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:19:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-29 09:19:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:19:07,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:07,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:19:07,005 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1093971820, now seen corresponding path program 1 times [2020-10-29 09:19:07,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926735047] [2020-10-29 09:19:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:07,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:07,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:19:07,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-10-29 09:19:07,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:07,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:19:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:19:07,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:19:07,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:19:07,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:19:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:07,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:07,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:07,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:19:07,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:07,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:19:07,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:07,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:19:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:19:07,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:19:07,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:07,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 09:19:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:19:07,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:19:07,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:19:07,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-29 09:19:07,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:19:07,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 09:19:07,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:19:07,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:19:07,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:19:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-29 09:19:07,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:19:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:19:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:19:07,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926735047] [2020-10-29 09:19:07,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:19:07,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 09:19:07,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206522770] [2020-10-29 09:19:07,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:19:07,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:19:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:19:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:19:08,004 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2020-10-29 09:19:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:19:08,443 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-29 09:19:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:19:08,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-29 09:19:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:19:08,453 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:19:08,453 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:19:08,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:19:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:19:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:19:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:19:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-10-29 09:19:08,516 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 15 [2020-10-29 09:19:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:19:08,518 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-10-29 09:19:08,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:19:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-10-29 09:19:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:19:08,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:19:08,520 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] [2020-10-29 09:19:08,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:19:08,520 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:19:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:19:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1045527591, now seen corresponding path program 1 times [2020-10-29 09:19:08,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:19:08,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623306177] [2020-10-29 09:19:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:19:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:19:08,571 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:19:08,572 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:19:08,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:19:08,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:19:08 BoogieIcfgContainer [2020-10-29 09:19:08,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:19:08,598 INFO L168 Benchmark]: Toolchain (without parser) took 2621.85 ms. Allocated memory is still 158.3 MB. Free memory was 133.8 MB in the beginning and 115.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:08,599 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:19:08,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.77 ms. Allocated memory is still 158.3 MB. Free memory was 133.1 MB in the beginning and 123.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:08,601 INFO L168 Benchmark]: Boogie Preprocessor took 38.30 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:08,602 INFO L168 Benchmark]: RCFGBuilder took 611.55 ms. Allocated memory is still 158.3 MB. Free memory was 122.1 MB in the beginning and 137.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:08,603 INFO L168 Benchmark]: TraceAbstraction took 1714.28 ms. Allocated memory is still 158.3 MB. Free memory was 137.2 MB in the beginning and 115.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:19:08,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 158.3 MB. Free memory is still 131.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.77 ms. Allocated memory is still 158.3 MB. Free memory was 133.1 MB in the beginning and 123.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.30 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 611.55 ms. Allocated memory is still 158.3 MB. Free memory was 122.1 MB in the beginning and 137.2 MB in the end (delta: -15.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1714.28 ms. Allocated memory is still 158.3 MB. Free memory was 137.2 MB in the beginning and 115.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) [L34] CALL, EXPR f(a, &p1, &p2) [L14] COND TRUE a == 4 [L15] CALL g(p1, p2) [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L15] RET g(p1, p2) [L16] return 1; [L34] RET, EXPR f(a, &p1, &p2) [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L42] CALL reach_error() [L3] __assert_fail("0", "test06.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 19 SDslu, 41 SDs, 0 SdLazy, 57 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 882 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...