/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/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:12,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:12,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:12,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:12,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:12,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:12,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:12,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:12,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:12,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:12,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:12,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:12,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:12,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:12,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:12,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:12,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:12,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:12,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:12,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:12,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:12,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:12,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:12,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:12,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:12,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:12,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:12,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:12,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:12,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:12,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:12,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:12,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:12,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:12,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:12,918 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:12,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:12,919 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:12,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:12,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:12,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:12,921 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 10:51:12,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:12,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:12,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:12,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:12,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:12,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:12,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:12,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:12,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:12,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:12,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:12,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:12,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:12,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:12,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:12,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:12,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:12,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:12,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:12,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:12,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:12,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:12,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:12,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:12,951 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 10:51:13,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:13,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:13,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:13,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:13,295 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:13,296 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-10-13 10:51:13,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46c4886ee/9a7721f508e0445bbf2d6c0ec9f0256d/FLAGcf5e00ec7 [2020-10-13 10:51:13,796 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:13,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-10-13 10:51:13,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46c4886ee/9a7721f508e0445bbf2d6c0ec9f0256d/FLAGcf5e00ec7 [2020-10-13 10:51:14,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46c4886ee/9a7721f508e0445bbf2d6c0ec9f0256d [2020-10-13 10:51:14,246 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:14,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:14,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:14,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:14,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:14,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c09893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14, skipping insertion in model container [2020-10-13 10:51:14,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:14,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:14,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:14,490 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:14,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:14,519 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:14,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14 WrapperNode [2020-10-13 10:51:14,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:14,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:14,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:14,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:14,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (1/1) ... [2020-10-13 10:51:14,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:14,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:14,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:14,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:14,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (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 10:51:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:14,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:14,877 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:51:14,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:14 BoogieIcfgContainer [2020-10-13 10:51:14,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:14,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:14,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:14,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:14,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:14" (1/3) ... [2020-10-13 10:51:14,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57692968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:14, skipping insertion in model container [2020-10-13 10:51:14,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:14" (2/3) ... [2020-10-13 10:51:14,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57692968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:14, skipping insertion in model container [2020-10-13 10:51:14,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:14" (3/3) ... [2020-10-13 10:51:14,889 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-10-13 10:51:14,899 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:14,906 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:14,920 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:14,944 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:14,944 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:14,944 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:14,945 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:14,945 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:14,945 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:14,945 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:14,945 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-13 10:51:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:51:14,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:14,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:14,970 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:14,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:14,975 INFO L82 PathProgramCache]: Analyzing trace with hash 826978896, now seen corresponding path program 1 times [2020-10-13 10:51:14,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:14,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891188890] [2020-10-13 10:51:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:15,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:51:15,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:15,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-13 10:51:15,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:15,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:51:15,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:15,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:51:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:15,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:15,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:15,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:51:15,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:15,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:15,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:15,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:51:15,329 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 10:51:15,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891188890] [2020-10-13 10:51:15,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:15,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:15,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485018709] [2020-10-13 10:51:15,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:15,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:15,406 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-13 10:51:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:15,511 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-13 10:51:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:15,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:51:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:15,523 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:51:15,523 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 10:51:15,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 10:51:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-13 10:51:15,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:51:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-13 10:51:15,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2020-10-13 10:51:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:15,577 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-13 10:51:15,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-13 10:51:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:51:15,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:15,578 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:15,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:15,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1747164342, now seen corresponding path program 1 times [2020-10-13 10:51:15,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:15,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506352600] [2020-10-13 10:51:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:15,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:51:15,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:15,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-13 10:51:15,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:51:15,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:51:15,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:15,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:15,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:15,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:15,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:15,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:15,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:15,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:51:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:15,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:15,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:15,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:51:15,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:15,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:15,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:15,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506352600] [2020-10-13 10:51:15,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:15,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:51:15,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407431620] [2020-10-13 10:51:15,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:15,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:15,952 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-13 10:51:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:16,049 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:51:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:16,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 10:51:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:16,053 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:51:16,053 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:51:16,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:51:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:51:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:51:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-13 10:51:16,062 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-10-13 10:51:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:16,063 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-13 10:51:16,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:16,063 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-13 10:51:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:51:16,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:16,065 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:16,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:16,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1285061104, now seen corresponding path program 1 times [2020-10-13 10:51:16,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:16,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834001422] [2020-10-13 10:51:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:16,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:16,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:51:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-13 10:51:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:16,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:51:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:51:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:16,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:16,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:16,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:16,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:16,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:16,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:16,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:16,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:51:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:16,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:16,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:16,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:51:16,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:16,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:16,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:16,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:16,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 10:51:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:16,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:16,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:16,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:16,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:16,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834001422] [2020-10-13 10:51:16,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:16,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:16,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174854102] [2020-10-13 10:51:16,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:16,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:16,436 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-10-13 10:51:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:16,538 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-13 10:51:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:16,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 10:51:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:16,539 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:51:16,539 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:51:16,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:51:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:51:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:51:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:51:16,541 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-13 10:51:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:16,541 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:51:16,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:51:16,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:51:16,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:16,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:51:16,654 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:51:16,654 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:16,655 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:16,655 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:51:16,655 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:51:16,655 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:51:16,655 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:16,655 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-13 10:51:16,656 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:16,656 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:16,656 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-10-13 10:51:16,656 INFO L268 CegarLoopResult]: For program point L31(lines 27 32) no Hoare annotation was computed. [2020-10-13 10:51:16,656 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-13 10:51:16,656 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-10-13 10:51:16,657 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-13 10:51:16,657 INFO L264 CegarLoopResult]: At program point L27-2(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= 0 main_~glob2_p_off~0)) [2020-10-13 10:51:16,657 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 34) no Hoare annotation was computed. [2020-10-13 10:51:16,657 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-13 10:51:16,657 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-13 10:51:16,657 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 34) no Hoare annotation was computed. [2020-10-13 10:51:16,658 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-13 10:51:16,658 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:16,658 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:51:16,658 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:51:16,658 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:16,658 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-13 10:51:16,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:51:16 BoogieIcfgContainer [2020-10-13 10:51:16,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:51:16,679 INFO L168 Benchmark]: Toolchain (without parser) took 2430.62 ms. Allocated memory was 140.0 MB in the beginning and 235.4 MB in the end (delta: 95.4 MB). Free memory was 102.9 MB in the beginning and 156.1 MB in the end (delta: -53.3 MB). Peak memory consumption was 42.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:16,680 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:51:16,681 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.91 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:16,682 INFO L168 Benchmark]: Boogie Preprocessor took 100.95 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 180.2 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:16,683 INFO L168 Benchmark]: RCFGBuilder took 258.80 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 167.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:16,684 INFO L168 Benchmark]: TraceAbstraction took 1794.63 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 166.7 MB in the beginning and 156.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:16,688 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.91 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 100.95 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.2 MB in the beginning and 180.2 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.80 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 167.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1794.63 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 166.7 MB in the beginning and 156.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: glob2_pathlim_off <= MAXPATHLEN && 0 <= glob2_p_off - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 24 SDslu, 162 SDs, 0 SdLazy, 115 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 22 NumberOfFragments, 33 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 36 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1668 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 8/12 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 correct! Received shutdown request...