/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=BIGGEST --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/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:24:39,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:24:39,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:24:39,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:24:39,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:24:39,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:24:39,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:24:39,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:24:39,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:24:39,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:24:39,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:24:39,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:24:39,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:24:39,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:24:39,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:24:39,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:24:39,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:24:39,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:24:39,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:24:39,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:24:39,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:24:39,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:24:39,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:24:39,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:24:39,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:24:39,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:24:39,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:24:39,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:24:39,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:24:39,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:24:39,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:24:39,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:24:39,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:24:39,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:24:39,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:24:39,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:24:39,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:24:39,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:24:39,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:24:39,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:24:39,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:24:39,665 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 [2020-10-12 16:24:39,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:24:39,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:24:39,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:24:39,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:24:39,713 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:24:39,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:24:39,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:24:39,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:24:39,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:24:39,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:24:39,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:24:39,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:24:39,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:24:39,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:24:39,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:24:39,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:24:39,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:24:39,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:24:39,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:24:39,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:24:39,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:24:39,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:24:39,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:24:39,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:24:39,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:24:39,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:24:39,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:24:39,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:24:39,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:24:39,719 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:24:40,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:24:40,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:24:40,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:24:40,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:24:40,067 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:24:40,068 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-10-12 16:24:40,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/804865bf8/a197910e1f2545acb28a23098e3977fe/FLAGf171c0553 [2020-10-12 16:24:40,656 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:24:40,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/nec20.c [2020-10-12 16:24:40,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/804865bf8/a197910e1f2545acb28a23098e3977fe/FLAGf171c0553 [2020-10-12 16:24:41,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/804865bf8/a197910e1f2545acb28a23098e3977fe [2020-10-12 16:24:41,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:24:41,054 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:24:41,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:24:41,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:24:41,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:24:41,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72dcb5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41, skipping insertion in model container [2020-10-12 16:24:41,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:24:41,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:24:41,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:24:41,278 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:24:41,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:24:41,309 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:24:41,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41 WrapperNode [2020-10-12 16:24:41,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:24:41,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:24:41,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:24:41,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:24:41,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (1/1) ... [2020-10-12 16:24:41,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:24:41,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:24:41,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:24:41,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:24:41,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (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 [2020-10-12 16:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:24:41,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:24:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:24:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:24:41,732 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:24:41,733 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:24:41,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:24:41 BoogieIcfgContainer [2020-10-12 16:24:41,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:24:41,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:24:41,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:24:41,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:24:41,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:24:41" (1/3) ... [2020-10-12 16:24:41,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747ed926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:24:41, skipping insertion in model container [2020-10-12 16:24:41,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:41" (2/3) ... [2020-10-12 16:24:41,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747ed926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:24:41, skipping insertion in model container [2020-10-12 16:24:41,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:24:41" (3/3) ... [2020-10-12 16:24:41,748 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-10-12 16:24:41,759 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:24:41,767 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:24:41,784 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:24:41,814 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:24:41,815 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:24:41,815 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:24:41,815 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:24:41,816 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:24:41,816 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:24:41,816 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:24:41,816 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:24:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 16:24:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:24:41,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:41,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:41,843 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:41,850 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2020-10-12 16:24:41,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:41,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330761129] [2020-10-12 16:24:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:42,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:24:42,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:42,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-12 16:24:42,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:24:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:24:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:24:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:24:42,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:42,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:42,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:42,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:42,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:42,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:24:42,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:42,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:42,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:42,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:42,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330761129] [2020-10-12 16:24:42,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:24:42,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:24:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712519316] [2020-10-12 16:24:42,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:24:42,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:24:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:24:42,403 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2020-10-12 16:24:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:42,598 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-10-12 16:24:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:24:42,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 16:24:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:42,610 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:24:42,611 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:24:42,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:24:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:24:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:24:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:24:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-12 16:24:42,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-12 16:24:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:42,656 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-12 16:24:42,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:24:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-12 16:24:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:24:42,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:42,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:42,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:24:42,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:42,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2020-10-12 16:24:42,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:42,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369717368] [2020-10-12 16:24:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 16:24:42,714 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 16:24:42,714 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 16:24:42,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:24:42,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:24:42 BoogieIcfgContainer [2020-10-12 16:24:42,754 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:24:42,759 INFO L168 Benchmark]: Toolchain (without parser) took 1702.46 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 102.3 MB in the beginning and 125.6 MB in the end (delta: -23.3 MB). Peak memory consumption was 39.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:24:42,762 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-12 16:24:42,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.84 ms. Allocated memory is still 139.5 MB. Free memory was 101.9 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-12 16:24:42,765 INFO L168 Benchmark]: Boogie Preprocessor took 114.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 179.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:24:42,767 INFO L168 Benchmark]: RCFGBuilder took 312.91 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 166.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-12 16:24:42,768 INFO L168 Benchmark]: TraceAbstraction took 1014.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 125.6 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:24:42,781 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.84 ms. Allocated memory is still 139.5 MB. Free memory was 101.9 MB in the beginning and 92.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 179.9 MB in the end (delta: -87.8 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.91 ms. Allocated memory is still 202.4 MB. Free memory was 179.9 MB in the beginning and 166.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1014.81 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 125.6 MB in the end (delta: 40.6 MB). Peak memory consumption was 40.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; [L17] COND TRUE \read(k) [L18] n=0 [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 [L28] COND FALSE !(i <= n) [L33] a[i]=0 [L34] CALL __VERIFIER_assert(j<1025) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 22 SDslu, 11 SDs, 0 SdLazy, 24 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 0.3s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 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...