/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 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:11:12,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:11:12,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:11:12,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:11:12,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:11:12,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:11:12,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:11:12,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:11:12,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:11:12,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:11:12,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:11:12,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:11:12,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:11:12,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:11:12,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:11:12,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:11:12,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:11:12,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:11:12,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:11:12,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:11:12,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:11:12,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:11:12,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:11:12,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:11:12,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:11:12,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:11:12,429 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:11:12,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:11:12,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:11:12,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:11:12,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:11:12,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:11:12,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:11:12,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:11:12,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:11:12,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:11:12,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:11:12,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:11:12,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:11:12,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:11:12,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:11:12,442 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 [2020-10-13 11:11:12,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:11:12,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:11:12,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:11:12,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:11:12,488 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:11:12,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:11:12,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:11:12,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:11:12,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:11:12,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:11:12,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:11:12,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:11:12,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:11:12,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:11:12,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:11:12,492 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:11:12,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:11:12,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:11:12,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:11:12,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:11:12,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:11:12,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:11:12,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:11:12,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:11:12,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:11:12,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:11:12,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:11:12,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:11:12,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:11:12,494 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 -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:11:12,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:11:12,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:11:12,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:11:12,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:11:12,785 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:11:12,786 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-10-13 11:11:12,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b64857f0/13f93a3c354b4847a07cc0b2b9c7bbb5/FLAG68a224b8d [2020-10-13 11:11:13,285 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:11:13,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/trex02-2.c [2020-10-13 11:11:13,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b64857f0/13f93a3c354b4847a07cc0b2b9c7bbb5/FLAG68a224b8d [2020-10-13 11:11:13,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7b64857f0/13f93a3c354b4847a07cc0b2b9c7bbb5 [2020-10-13 11:11:13,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:11:13,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:11:13,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:13,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:11:13,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:11:13,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2b9410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13, skipping insertion in model container [2020-10-13 11:11:13,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:11:13,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:11:13,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:13,854 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:11:13,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:11:13,885 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:11:13,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13 WrapperNode [2020-10-13 11:11:13,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:11:13,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:11:13,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:11:13,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:11:13,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (1/1) ... [2020-10-13 11:11:13,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:11:13,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:11:13,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:11:13,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:11:13,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (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 [2020-10-13 11:11:14,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:11:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:11:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:11:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-13 11:11:14,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:11:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:11:14,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:11:14,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:11:14,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:11:14,244 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:11:14,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:14 BoogieIcfgContainer [2020-10-13 11:11:14,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:11:14,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:11:14,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:11:14,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:11:14,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:11:13" (1/3) ... [2020-10-13 11:11:14,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62250708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:14, skipping insertion in model container [2020-10-13 11:11:14,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:11:13" (2/3) ... [2020-10-13 11:11:14,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62250708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:11:14, skipping insertion in model container [2020-10-13 11:11:14,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:11:14" (3/3) ... [2020-10-13 11:11:14,263 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-10-13 11:11:14,271 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:11:14,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:11:14,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:11:14,313 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:11:14,313 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:11:14,313 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:11:14,314 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:11:14,314 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:11:14,314 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:11:14,314 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:11:14,314 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:11:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 11:11:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 11:11:14,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:14,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:14,341 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:14,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-10-13 11:11:14,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:14,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052878556] [2020-10-13 11:11:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:14,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:14,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:14,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 11:11:14,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:14,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-13 11:11:14,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:11:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:11:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:11:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:14,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:14,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:11:14,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:11:14,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:11:14,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:11:14,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:11:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:11:14,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:11:14,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:11:14,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:11:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:11:14,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052878556] [2020-10-13 11:11:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:11:14,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:11:14,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070009285] [2020-10-13 11:11:14,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:11:14,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:11:14,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:11:14,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:11:14,590 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 11:11:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:14,650 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-13 11:11:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:11:14,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-13 11:11:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:14,664 INFO L225 Difference]: With dead ends: 35 [2020-10-13 11:11:14,665 INFO L226 Difference]: Without dead ends: 18 [2020-10-13 11:11:14,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:11:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-13 11:11:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-13 11:11:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-13 11:11:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-13 11:11:14,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-10-13 11:11:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:14,725 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-13 11:11:14,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:11:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-13 11:11:14,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 11:11:14,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:14,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:14,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:11:14,729 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-10-13 11:11:14,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:14,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489548886] [2020-10-13 11:11:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 11:11:14,763 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 11:11:14,764 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 11:11:14,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:11:14,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 11:11:14 BoogieIcfgContainer [2020-10-13 11:11:14,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 11:11:14,816 INFO L168 Benchmark]: Toolchain (without parser) took 1156.27 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 142.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:14,817 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 11:11:14,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.62 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 95.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:14,822 INFO L168 Benchmark]: Boogie Preprocessor took 111.19 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 95.0 MB in the beginning and 184.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:14,826 INFO L168 Benchmark]: RCFGBuilder took 252.11 ms. Allocated memory is still 205.0 MB. Free memory was 183.5 MB in the beginning and 171.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:14,827 INFO L168 Benchmark]: TraceAbstraction took 556.09 ms. Allocated memory is still 205.0 MB. Free memory was 171.1 MB in the beginning and 142.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-10-13 11:11:14,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.62 ms. Allocated memory is still 141.6 MB. Free memory was 104.2 MB in the beginning and 95.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.19 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 95.0 MB in the beginning and 184.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.11 ms. Allocated memory is still 205.0 MB. Free memory was 183.5 MB in the beginning and 171.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 556.09 ms. Allocated memory is still 205.0 MB. Free memory was 171.1 MB in the beginning and 142.7 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) [L26] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 5 SDslu, 10 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 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...