/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:01:45,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:01:45,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:01:45,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:01:45,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:01:45,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:01:45,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:01:45,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:01:45,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:01:45,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:01:45,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:01:45,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:01:45,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:01:45,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:01:45,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:01:45,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:01:45,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:01:45,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:01:45,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:01:45,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:01:45,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:01:45,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:01:45,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:01:45,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:01:45,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:01:45,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:01:45,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:01:45,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:01:45,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:01:45,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:01:45,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:01:45,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:01:45,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:01:45,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:01:45,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:01:45,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:01:45,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:01:45,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:01:45,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:01:45,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:01:45,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:01:45,927 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 [2020-09-25 08:01:45,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:01:45,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:01:45,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:01:45,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:01:45,976 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:01:45,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:01:45,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:01:45,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:01:45,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:01:45,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:01:45,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:01:45,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:01:45,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:01:45,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:01:45,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:01:45,979 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:01:45,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:01:45,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:01:45,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:01:45,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:01:45,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:01:45,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:01:45,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:01:45,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:01:45,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:01:45,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:01:45,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:01:45,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:01:45,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:01:45,982 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:01:46,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:01:46,467 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:01:46,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:01:46,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:01:46,475 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:01:46,477 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 08:01:46,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461477497/886effc486ba4606a99e1d155942b977/FLAG5ad2048a7 [2020-09-25 08:01:47,041 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:01:47,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-09-25 08:01:47,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461477497/886effc486ba4606a99e1d155942b977/FLAG5ad2048a7 [2020-09-25 08:01:47,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/461477497/886effc486ba4606a99e1d155942b977 [2020-09-25 08:01:47,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:01:47,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:01:47,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:47,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:01:47,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:01:47,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b7fd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47, skipping insertion in model container [2020-09-25 08:01:47,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:01:47,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:01:47,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:47,721 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:01:47,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:01:47,751 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:01:47,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47 WrapperNode [2020-09-25 08:01:47,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:01:47,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:01:47,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:01:47,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:01:47,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (1/1) ... [2020-09-25 08:01:47,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:01:47,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:01:47,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:01:47,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:01:47,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (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 [2020-09-25 08:01:47,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:01:47,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:01:47,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:01:47,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:01:47,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:01:47,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:01:47,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:01:47,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:01:47,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:01:48,117 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:01:48,117 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 08:01:48,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:48 BoogieIcfgContainer [2020-09-25 08:01:48,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:01:48,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:01:48,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:01:48,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:01:48,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:01:47" (1/3) ... [2020-09-25 08:01:48,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c42806e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:48, skipping insertion in model container [2020-09-25 08:01:48,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:01:47" (2/3) ... [2020-09-25 08:01:48,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c42806e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:01:48, skipping insertion in model container [2020-09-25 08:01:48,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:01:48" (3/3) ... [2020-09-25 08:01:48,133 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-09-25 08:01:48,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:01:48,160 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:01:48,184 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:01:48,221 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:01:48,221 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:01:48,222 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:01:48,222 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:01:48,222 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:01:48,223 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:01:48,223 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:01:48,223 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:01:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 08:01:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 08:01:48,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:48,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:48,259 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 08:01:48,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:48,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729219890] [2020-09-25 08:01:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:48,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 08:01:48,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-25 08:01:48,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:48,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 08:01:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:48,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:01:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:48,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:48,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:01:48,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:48,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:48,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729219890] [2020-09-25 08:01:48,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:48,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 08:01:48,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426259698] [2020-09-25 08:01:48,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 08:01:48,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 08:01:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:01:48,560 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-25 08:01:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:48,583 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-25 08:01:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 08:01:48,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 08:01:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:48,593 INFO L225 Difference]: With dead ends: 33 [2020-09-25 08:01:48,593 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 08:01:48,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 08:01:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 08:01:48,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-25 08:01:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 08:01:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 08:01:48,636 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 08:01:48,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:48,636 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 08:01:48,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 08:01:48,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 08:01:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 08:01:48,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:48,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:48,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:01:48,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:48,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-25 08:01:48,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:48,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145319966] [2020-09-25 08:01:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:48,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:48,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 08:01:48,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:48,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-09-25 08:01:48,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:48,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:01:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 08:01:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-25 08:01:48,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 08:01:48,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:48,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:48,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:48,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:48,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:48,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:01:48,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:48,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:48,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:48,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:48,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145319966] [2020-09-25 08:01:48,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:01:48,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 08:01:48,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877398612] [2020-09-25 08:01:48,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 08:01:48,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 08:01:48,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:48,973 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-25 08:01:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:49,010 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-25 08:01:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 08:01:49,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-25 08:01:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:49,012 INFO L225 Difference]: With dead ends: 24 [2020-09-25 08:01:49,012 INFO L226 Difference]: Without dead ends: 19 [2020-09-25 08:01:49,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 08:01:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-25 08:01:49,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-09-25 08:01:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 08:01:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 08:01:49,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 08:01:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:49,025 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 08:01:49,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 08:01:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 08:01:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 08:01:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:49,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:49,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:01:49,027 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 08:01:49,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:49,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395901384] [2020-09-25 08:01:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:49,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:49,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 08:01:49,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:49,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-09-25 08:01:49,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:49,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 08:01:49,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:49,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:01:49,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:49,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:49,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:49,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:01:49,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:49,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:49,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395901384] [2020-09-25 08:01:49,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:49,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 08:01:49,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688918363] [2020-09-25 08:01:49,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 08:01:49,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 08:01:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:01:49,532 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-25 08:01:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:49,581 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 08:01:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 08:01:49,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-25 08:01:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:49,584 INFO L225 Difference]: With dead ends: 31 [2020-09-25 08:01:49,584 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 08:01:49,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:01:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 08:01:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-25 08:01:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 08:01:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 08:01:49,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 08:01:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:49,596 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 08:01:49,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 08:01:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 08:01:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 08:01:49,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:49,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:49,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:01:49,599 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 08:01:49,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:49,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487865414] [2020-09-25 08:01:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:49,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:50,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:50,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 08:01:50,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:50,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-09-25 08:01:50,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:50,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:01:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:50,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 08:01:50,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:50,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:50,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:50,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:50,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:50,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:50,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:50,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:50,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:50,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487865414] [2020-09-25 08:01:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:50,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 08:01:50,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460200455] [2020-09-25 08:01:50,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:01:50,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:01:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:01:50,199 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 08:01:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:50,252 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-25 08:01:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 08:01:50,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 08:01:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:50,254 INFO L225 Difference]: With dead ends: 36 [2020-09-25 08:01:50,254 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 08:01:50,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 08:01:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 08:01:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 08:01:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 08:01:50,261 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 08:01:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:50,262 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 08:01:50,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:01:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 08:01:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 08:01:50,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:50,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:50,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:01:50,263 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:50,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:50,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 08:01:50,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:50,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856406276] [2020-09-25 08:01:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:50,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:50,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:51,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 08:01:51,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:51,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-09-25 08:01:51,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:51,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:51,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 08:01:51,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:51,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 08:01:51,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:51,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:51,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:51,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856406276] [2020-09-25 08:01:51,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:51,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 08:01:51,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091033317] [2020-09-25 08:01:51,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 08:01:51,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 08:01:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-25 08:01:51,262 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-25 08:01:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:51,326 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-25 08:01:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 08:01:51,328 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-25 08:01:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:51,329 INFO L225 Difference]: With dead ends: 41 [2020-09-25 08:01:51,329 INFO L226 Difference]: Without dead ends: 36 [2020-09-25 08:01:51,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:01:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-25 08:01:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-09-25 08:01:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 08:01:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 08:01:51,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 08:01:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:51,345 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 08:01:51,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 08:01:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 08:01:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 08:01:51,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:51,347 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:51,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:01:51,348 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:51,349 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 08:01:51,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:51,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476204087] [2020-09-25 08:01:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:51,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:51,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:52,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:52,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:01:52,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:52,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-09-25 08:01:52,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:52,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:52,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:01:52,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 08:01:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:52,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:52,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 08:01:52,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:52,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:52,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476204087] [2020-09-25 08:01:52,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:52,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 08:01:52,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807966858] [2020-09-25 08:01:52,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 08:01:52,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 08:01:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:01:52,273 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 9 states. [2020-09-25 08:01:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:52,367 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 08:01:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 08:01:52,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-25 08:01:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:52,369 INFO L225 Difference]: With dead ends: 46 [2020-09-25 08:01:52,369 INFO L226 Difference]: Without dead ends: 41 [2020-09-25 08:01:52,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-25 08:01:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-09-25 08:01:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 08:01:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 08:01:52,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 08:01:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:52,386 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 08:01:52,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 08:01:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 08:01:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 08:01:52,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:52,388 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:52,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:01:52,389 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:52,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 08:01:52,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:52,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679346683] [2020-09-25 08:01:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:52,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:52,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:53,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:53,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 08:01:53,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:01:53,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-09-25 08:01:53,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:53,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 08:01:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 08:01:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 08:01:53,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:01:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:01:53,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:01:53,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:01:53,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 08:01:53,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:01:53,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 08:01:53,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:01:53,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:01:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:01:53,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:01:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:01:53,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679346683] [2020-09-25 08:01:53,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:01:53,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 08:01:53,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708826054] [2020-09-25 08:01:53,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:01:53,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:01:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:01:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:01:53,616 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-25 08:01:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:01:53,686 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 08:01:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 08:01:53,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 08:01:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:01:53,688 INFO L225 Difference]: With dead ends: 51 [2020-09-25 08:01:53,688 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 08:01:53,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:01:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 08:01:53,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-09-25 08:01:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 08:01:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 08:01:53,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 08:01:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:01:53,696 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 08:01:53,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:01:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 08:01:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 08:01:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:01:53,697 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:01:53,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:01:53,698 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:01:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:01:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 08:01:53,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:01:53,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635736840] [2020-09-25 08:01:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:01:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 08:01:53,716 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 08:01:53,716 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 08:01:53,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:01:53,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 08:01:53 BoogieIcfgContainer [2020-09-25 08:01:53,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 08:01:53,751 INFO L168 Benchmark]: Toolchain (without parser) took 6345.30 ms. Allocated memory was 148.4 MB in the beginning and 271.6 MB in the end (delta: 123.2 MB). Free memory was 105.0 MB in the beginning and 128.5 MB in the end (delta: -23.4 MB). Peak memory consumption was 99.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,758 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,759 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.25 ms. Allocated memory is still 148.4 MB. Free memory was 104.2 MB in the beginning and 95.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,760 INFO L168 Benchmark]: Boogie Preprocessor took 113.54 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 95.1 MB in the beginning and 184.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,761 INFO L168 Benchmark]: RCFGBuilder took 254.45 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 172.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,764 INFO L168 Benchmark]: TraceAbstraction took 5622.57 ms. Allocated memory was 205.0 MB in the beginning and 271.6 MB in the end (delta: 66.6 MB). Free memory was 172.4 MB in the beginning and 128.5 MB in the end (delta: 44.0 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-09-25 08:01:53,776 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 148.4 MB. Free memory was 123.0 MB in the beginning and 122.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.25 ms. Allocated memory is still 148.4 MB. Free memory was 104.2 MB in the beginning and 95.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.54 ms. Allocated memory was 148.4 MB in the beginning and 205.0 MB in the end (delta: 56.6 MB). Free memory was 95.1 MB in the beginning and 184.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.45 ms. Allocated memory is still 205.0 MB. Free memory was 183.7 MB in the beginning and 172.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5622.57 ms. Allocated memory was 205.0 MB in the beginning and 271.6 MB in the end (delta: 66.6 MB). Free memory was 172.4 MB in the beginning and 128.5 MB in the end (delta: 44.0 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(y != 64) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 87 SDslu, 552 SDs, 0 SdLazy, 152 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 193 NumberOfCodeBlocks, 193 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 19585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/115 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...