/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/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:08,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:08,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:08,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:08,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:08,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:08,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:08,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:08,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:08,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:08,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:08,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:08,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:08,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:08,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:08,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:08,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:08,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:08,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:09,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:09,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:09,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:09,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:09,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:09,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:09,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:09,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:09,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:09,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:09,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:09,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:09,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:09,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:09,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:09,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:09,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:09,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:09,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:09,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:09,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:09,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:09,028 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 10:51:09,049 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:09,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:09,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:09,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:09,051 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:09,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:09,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:09,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:09,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:09,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:09,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:09,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:09,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:09,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:09,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:09,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:09,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:09,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:09,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:09,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:09,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:09,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:09,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:09,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:09,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:09,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:09,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:09,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:09,056 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 10:51:09,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:09,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:09,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:09,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:09,354 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:09,355 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-13 10:51:09,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ceeeb59/82e5cce879804a78ad96c88f214085d0/FLAGcd6568b77 [2020-10-13 10:51:09,868 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:09,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-13 10:51:09,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ceeeb59/82e5cce879804a78ad96c88f214085d0/FLAGcd6568b77 [2020-10-13 10:51:10,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9ceeeb59/82e5cce879804a78ad96c88f214085d0 [2020-10-13 10:51:10,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:10,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:10,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:10,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:10,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:10,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab3eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10, skipping insertion in model container [2020-10-13 10:51:10,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:10,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:10,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:10,450 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:10,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:10,481 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:10,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10 WrapperNode [2020-10-13 10:51:10,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:10,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:10,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:10,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:10,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (1/1) ... [2020-10-13 10:51:10,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:10,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:10,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:10,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:10,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (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 10:51:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:10,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:10,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:10,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:10,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:10,898 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:10,899 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 10:51:10,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:10 BoogieIcfgContainer [2020-10-13 10:51:10,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:10,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:10,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:10,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:10,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:10" (1/3) ... [2020-10-13 10:51:10,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cbf045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:10, skipping insertion in model container [2020-10-13 10:51:10,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:10" (2/3) ... [2020-10-13 10:51:10,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33cbf045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:10, skipping insertion in model container [2020-10-13 10:51:10,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:10" (3/3) ... [2020-10-13 10:51:10,912 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-13 10:51:10,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:10,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:10,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:10,977 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:10,977 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:10,978 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:10,978 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:10,978 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:10,979 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:10,979 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:10,979 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 10:51:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:51:11,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:11,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:11,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1671060194, now seen corresponding path program 1 times [2020-10-13 10:51:11,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:11,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886362157] [2020-10-13 10:51:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:11,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:11,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:11,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:11,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:51:11,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:51:11,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-13 10:51:11,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:11,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:51:11,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:51:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:51:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:11,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:11,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:11,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:11,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:51:11,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:11,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:11,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:51:11,947 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 10:51:11,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886362157] [2020-10-13 10:51:11,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:11,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:11,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430100626] [2020-10-13 10:51:11,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:11,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:11,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:11,979 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-10-13 10:51:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:12,230 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-10-13 10:51:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:12,232 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 10:51:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:12,248 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:51:12,249 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:51:12,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:51:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 10:51:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:51:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 10:51:12,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-13 10:51:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:12,296 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 10:51:12,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:12,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 10:51:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:51:12,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:12,297 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:12,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:12,298 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:12,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 514965223, now seen corresponding path program 1 times [2020-10-13 10:51:12,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:12,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787318239] [2020-10-13 10:51:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:12,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:12,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:51:12,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:51:12,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-13 10:51:12,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:12,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:51:12,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:51:12,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:12,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:12,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:12,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:12,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:12,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:12,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:12,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:12,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:12,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787318239] [2020-10-13 10:51:12,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:12,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:51:12,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122361604] [2020-10-13 10:51:12,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:12,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:12,810 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-13 10:51:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:13,091 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-13 10:51:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:13,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 10:51:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:13,094 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:51:13,094 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 10:51:13,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 10:51:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-13 10:51:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:51:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 10:51:13,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2020-10-13 10:51:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:13,115 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 10:51:13,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 10:51:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:51:13,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:13,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:13,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:13,119 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1134636734, now seen corresponding path program 1 times [2020-10-13 10:51:13,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:13,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766994347] [2020-10-13 10:51:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:13,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:14,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:51:14,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:51:14,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-13 10:51:14,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:14,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:14,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:51:14,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:51:14,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:14,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:14,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:14,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:14,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:51:14,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:14,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:14,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:14,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:14,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:14,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:14,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:14,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766994347] [2020-10-13 10:51:14,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:14,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:14,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12550582] [2020-10-13 10:51:14,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:14,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:14,139 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-10-13 10:51:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:14,492 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-13 10:51:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:14,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-13 10:51:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:14,503 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:51:14,503 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 10:51:14,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:51:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 10:51:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2020-10-13 10:51:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:51:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-13 10:51:14,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2020-10-13 10:51:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:14,540 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-13 10:51:14,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-13 10:51:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:51:14,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:14,544 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:14,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:14,544 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash 848296232, now seen corresponding path program 1 times [2020-10-13 10:51:14,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:14,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938426832] [2020-10-13 10:51:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:15,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:16,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:51:17,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 10:51:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2781 [2020-10-13 10:51:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:51:17,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:51:17,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:17,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:17,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:17,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:17,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:17,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:17,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:17,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 10:51:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:17,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:17,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:17,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 10:51:17,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:17,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:51:17,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938426832] [2020-10-13 10:51:17,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:17,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:17,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673770959] [2020-10-13 10:51:17,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:17,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:17,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:17,388 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-10-13 10:51:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:17,491 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2020-10-13 10:51:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:17,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-13 10:51:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:17,493 INFO L225 Difference]: With dead ends: 71 [2020-10-13 10:51:17,493 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:51:17,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:51:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 10:51:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 10:51:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 10:51:17,504 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-10-13 10:51:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:17,504 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 10:51:17,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 10:51:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:51:17,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:17,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:17,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:17,506 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -670641491, now seen corresponding path program 2 times [2020-10-13 10:51:17,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:17,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114323181] [2020-10-13 10:51:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:51:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-13 10:51:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4483 [2020-10-13 10:51:22,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 10:51:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:51:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:51:22,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:22,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:22,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:22,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:22,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:22,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:22,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:22,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 10:51:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:22,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:22,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:22,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:22,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:22,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:22,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:22,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:51:22,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114323181] [2020-10-13 10:51:22,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:22,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:22,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395615028] [2020-10-13 10:51:22,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:22,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:22,087 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 8 states. [2020-10-13 10:51:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:22,228 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-13 10:51:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:22,229 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-13 10:51:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:22,229 INFO L225 Difference]: With dead ends: 42 [2020-10-13 10:51:22,229 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:51:22,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:51:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:51:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:51:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:51:22,231 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-10-13 10:51:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:22,232 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:51:22,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:51:22,232 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:51:22,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:22,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:51:22,407 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,407 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) [2020-10-13 10:51:22,407 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,407 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,408 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:51:22,408 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:51:22,408 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,408 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,408 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-13 10:51:22,408 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,408 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,409 INFO L271 CegarLoopResult]: At program point L27(lines 14 29) the Hoare annotation is: true [2020-10-13 10:51:22,409 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 29) no Hoare annotation was computed. [2020-10-13 10:51:22,409 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-10-13 10:51:22,409 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 26) the Hoare annotation is: (or (<= main_~i~0 0) (and (<= main_~j~0 (* 2 main_~i~0)) (<= main_~i~0 1)) (<= main_~j~0 (+ main_~k~0 1))) [2020-10-13 10:51:22,409 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-13 10:51:22,409 INFO L268 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-13 10:51:22,410 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= .cse2 main_~j~0)) (.cse1 (<= (+ main_~i~0 1) main_~n~0))) (or (and .cse0 (<= main_~j~0 (+ main_~k~0 1)) .cse1) (and .cse0 (<= main_~j~0 .cse2) .cse1)))) [2020-10-13 10:51:22,410 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-13 10:51:22,410 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) [2020-10-13 10:51:22,410 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-10-13 10:51:22,410 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 29) no Hoare annotation was computed. [2020-10-13 10:51:22,411 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 29) the Hoare annotation is: true [2020-10-13 10:51:22,411 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~k~0 1) main_~j~0) (<= (+ main_~i~0 1) main_~n~0) (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) [2020-10-13 10:51:22,411 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 26) no Hoare annotation was computed. [2020-10-13 10:51:22,411 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-13 10:51:22,411 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-10-13 10:51:22,411 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-13 10:51:22,412 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:22,412 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:51:22,412 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:51:22,412 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:22,412 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-13 10:51:22,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:51:22 BoogieIcfgContainer [2020-10-13 10:51:22,434 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:51:22,437 INFO L168 Benchmark]: Toolchain (without parser) took 12216.35 ms. Allocated memory was 141.0 MB in the beginning and 375.4 MB in the end (delta: 234.4 MB). Free memory was 103.9 MB in the beginning and 165.6 MB in the end (delta: -61.8 MB). Peak memory consumption was 172.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,438 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:51:22,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.76 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,439 INFO L168 Benchmark]: Boogie Preprocessor took 101.70 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.0 MB in the beginning and 182.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,440 INFO L168 Benchmark]: RCFGBuilder took 318.39 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 167.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,441 INFO L168 Benchmark]: TraceAbstraction took 11529.27 ms. Allocated memory was 203.9 MB in the beginning and 375.4 MB in the end (delta: 171.4 MB). Free memory was 166.5 MB in the beginning and 165.6 MB in the end (delta: 845.3 kB). Peak memory consumption was 172.3 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,445 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 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.76 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 101.70 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 94.0 MB in the beginning and 182.4 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.39 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 167.1 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11529.27 ms. Allocated memory was 203.9 MB in the beginning and 375.4 MB in the end (delta: 171.4 MB). Free memory was 166.5 MB in the beginning and 165.6 MB in the end (delta: 845.3 kB). Peak memory consumption was 172.3 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: 25]: Loop Invariant Derived loop invariant: (2 * i <= j && i + 1 <= n) && j + 3 <= i + 2 * n - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (i <= 0 || (j <= 2 * i && i <= 1)) || j <= k + 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((2 * i <= j && j <= k + 1) && i + 1 <= n) || ((2 * i <= j && j <= 2 * i) && i + 1 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.2s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 169 SDslu, 117 SDs, 0 SdLazy, 388 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, 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, 5 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 18 PreInvPairs, 35 NumberOfFragments, 104 HoareAnnotationTreeSize, 18 FomulaSimplifications, 607 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 83 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 142 NumberOfCodeBlocks, 142 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 7915 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 50/52 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...