/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:38:16,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:38:16,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:38:16,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:38:16,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:38:16,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:38:16,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:38:16,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:38:16,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:38:16,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:38:16,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:38:16,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:38:16,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:38:16,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:38:16,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:38:16,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:38:16,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:38:16,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:38:16,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:38:16,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:38:16,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:38:16,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:38:16,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:38:16,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:38:16,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:38:16,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:38:16,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:38:16,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:38:16,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:38:16,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:38:16,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:38:16,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:38:16,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:38:16,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:38:16,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:38:16,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:38:16,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:38:16,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:38:16,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:38:16,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:38:16,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:38:16,947 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 [2020-10-14 05:38:16,971 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:38:16,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:38:16,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:38:16,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:38:16,973 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:38:16,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:38:16,974 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:38:16,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:38:16,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:38:16,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:38:16,975 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:38:16,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:38:16,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:38:16,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:38:16,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:38:16,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:38:16,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:38:16,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:38:16,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:38:16,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:38:16,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:38:16,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:38:16,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:38:16,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:38:16,978 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:38:17,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:38:17,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:38:17,319 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:38:17,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:38:17,321 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:38:17,322 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-14 05:38:17,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6173635e4/764e638c459e4afbbce59ee1e90b17ae/FLAGe19634287 [2020-10-14 05:38:17,900 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:38:17,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-14 05:38:17,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6173635e4/764e638c459e4afbbce59ee1e90b17ae/FLAGe19634287 [2020-10-14 05:38:18,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6173635e4/764e638c459e4afbbce59ee1e90b17ae [2020-10-14 05:38:18,257 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:38:18,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:38:18,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:18,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:38:18,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:38:18,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a7ca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18, skipping insertion in model container [2020-10-14 05:38:18,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:38:18,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:38:18,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:18,477 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:38:18,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:38:18,503 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:38:18,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18 WrapperNode [2020-10-14 05:38:18,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:38:18,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:38:18,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:38:18,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:38:18,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (1/1) ... [2020-10-14 05:38:18,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:38:18,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:38:18,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:38:18,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:38:18,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (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 [2020-10-14 05:38:18,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:38:18,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:38:18,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:38:18,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 05:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:38:18,873 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:38:18,874 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:38:18,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:18 BoogieIcfgContainer [2020-10-14 05:38:18,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:38:18,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:38:18,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:38:18,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:38:18,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:38:18" (1/3) ... [2020-10-14 05:38:18,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f6a931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:18, skipping insertion in model container [2020-10-14 05:38:18,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:38:18" (2/3) ... [2020-10-14 05:38:18,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f6a931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:38:18, skipping insertion in model container [2020-10-14 05:38:18,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:38:18" (3/3) ... [2020-10-14 05:38:18,886 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-14 05:38:18,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:38:18,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:38:18,918 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:38:18,940 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:38:18,940 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:38:18,941 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:38:18,941 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:38:18,941 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:38:18,941 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:38:18,941 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:38:18,941 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:38:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-14 05:38:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:38:18,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:18,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:18,963 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-10-14 05:38:18,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:18,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695459490] [2020-10-14 05:38:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:19,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:19,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:38:19,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:38:19,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 05:38:19,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:19,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:38:19,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:19,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 05:38:19,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:19,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:19,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:19,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:19,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:38:19,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:19,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:19,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:19,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:19,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:19,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695459490] [2020-10-14 05:38:19,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:19,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:38:19,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617088701] [2020-10-14 05:38:19,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:38:19,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:38:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:38:19,319 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-14 05:38:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:19,343 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 05:38:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:38:19,345 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:38:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:19,353 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:38:19,354 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:38:19,357 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 [2020-10-14 05:38:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:38:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:38:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:38:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:38:19,397 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:38:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:19,398 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:38:19,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:38:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:38:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:38:19,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:19,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:19,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:38:19,400 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:19,401 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-10-14 05:38:19,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:19,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239214954] [2020-10-14 05:38:19,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:19,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:38:19,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:19,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 05:38:19,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:19,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:19,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:38:19,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:19,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:38:19,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:19,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:19,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:19,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:19,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:38:19,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:19,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:19,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:19,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:19,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:19,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:19,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239214954] [2020-10-14 05:38:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:38:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994338452] [2020-10-14 05:38:19,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:38:19,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:38:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:38:19,574 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-14 05:38:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:19,712 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-14 05:38:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:38:19,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 05:38:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:19,720 INFO L225 Difference]: With dead ends: 23 [2020-10-14 05:38:19,720 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:38:19,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:38:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:38:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-14 05:38:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:38:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 05:38:19,734 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-10-14 05:38:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:19,736 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 05:38:19,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:38:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 05:38:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:38:19,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:19,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:19,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:38:19,740 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:19,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-10-14 05:38:19,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:19,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795784604] [2020-10-14 05:38:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:19,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:19,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:38:19,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:19,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-14 05:38:19,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:19,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:38:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:38:19,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:38:20,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:20,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:38:20,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:20,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:20,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:20,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795784604] [2020-10-14 05:38:20,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:20,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:38:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088529629] [2020-10-14 05:38:20,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:38:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:38:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:38:20,230 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-10-14 05:38:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:20,363 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-14 05:38:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:38:20,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-14 05:38:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:20,367 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:38:20,367 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:38:20,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:38:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:38:20,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-10-14 05:38:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:38:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-14 05:38:20,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-10-14 05:38:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:20,375 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-14 05:38:20,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:38:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-14 05:38:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:38:20,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:20,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:20,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:38:20,377 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:20,378 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-10-14 05:38:20,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:20,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029405768] [2020-10-14 05:38:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:38:20,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:38:20,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-14 05:38:20,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:38:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:38:20,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:20,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:20,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:20,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:20,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:38:20,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029405768] [2020-10-14 05:38:20,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:38:20,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:38:20,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517350854] [2020-10-14 05:38:20,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:38:20,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:38:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:38:20,569 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-10-14 05:38:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:20,588 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-14 05:38:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:38:20,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-14 05:38:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:20,590 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:38:20,590 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:38:20,591 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 [2020-10-14 05:38:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:38:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:38:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:38:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:38:20,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 18 [2020-10-14 05:38:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:20,596 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:38:20,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:38:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:38:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:38:20,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:20,597 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:20,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:38:20,597 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-10-14 05:38:20,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:20,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714778646] [2020-10-14 05:38:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:38:20,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:20,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-14 05:38:20,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:38:20,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:20,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:38:20,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:20,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:20,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:20,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714778646] [2020-10-14 05:38:20,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:20,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:38:20,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316678651] [2020-10-14 05:38:20,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:38:20,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:38:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:38:20,707 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-14 05:38:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:20,742 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-14 05:38:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:38:20,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 05:38:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:20,743 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:38:20,744 INFO L226 Difference]: Without dead ends: 21 [2020-10-14 05:38:20,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:38:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-14 05:38:20,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-14 05:38:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:38:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 05:38:20,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-14 05:38:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:20,750 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 05:38:20,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:38:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 05:38:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:38:20,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:20,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:20,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:38:20,751 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:20,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1110804949, now seen corresponding path program 2 times [2020-10-14 05:38:20,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:20,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477021263] [2020-10-14 05:38:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:20,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:20,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:20,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:38:20,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:20,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-14 05:38:20,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:20,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:38:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:20,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:38:20,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:21,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:21,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:21,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:21,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:38:21,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477021263] [2020-10-14 05:38:21,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:21,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:38:21,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413500935] [2020-10-14 05:38:21,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:38:21,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:38:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:38:21,023 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-10-14 05:38:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:21,198 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-14 05:38:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:38:21,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 05:38:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:21,201 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:38:21,201 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:38:21,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:38:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:38:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-14 05:38:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:38:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 05:38:21,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-14 05:38:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:21,207 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 05:38:21,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:38:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 05:38:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:38:21,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:21,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:21,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:38:21,209 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2020-10-14 05:38:21,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:21,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760705987] [2020-10-14 05:38:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:38:21,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-14 05:38:21,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:38:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:38:21,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:21,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:21,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:21,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:21,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:21,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:21,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760705987] [2020-10-14 05:38:21,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:21,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:38:21,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058812232] [2020-10-14 05:38:21,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:38:21,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:38:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:38:21,325 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-14 05:38:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:21,364 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-14 05:38:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:38:21,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 05:38:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:21,366 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:38:21,366 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:38:21,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:38:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:38:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-14 05:38:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:38:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 05:38:21,372 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-14 05:38:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:21,372 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 05:38:21,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:38:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 05:38:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:38:21,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:21,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:21,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:38:21,374 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2020-10-14 05:38:21,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:21,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919027930] [2020-10-14 05:38:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:38:21,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 05:38:21,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:38:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:38:21,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:21,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:21,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:21,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:21,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:21,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:21,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919027930] [2020-10-14 05:38:21,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:21,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:38:21,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47232951] [2020-10-14 05:38:21,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:38:21,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:38:21,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:38:21,537 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2020-10-14 05:38:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:21,596 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-14 05:38:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:38:21,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-14 05:38:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:21,597 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:38:21,598 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:38:21,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:38:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:38:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-14 05:38:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:38:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 05:38:21,603 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2020-10-14 05:38:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 05:38:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:38:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 05:38:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:38:21,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:21,605 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:21,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:38:21,606 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2020-10-14 05:38:21,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:21,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83782745] [2020-10-14 05:38:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:38:21,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-14 05:38:21,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:38:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:38:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:38:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:38:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:38:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:38:21,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:38:21,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:38:21,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:38:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:38:21,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:38:21,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:38:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:38:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:38:21,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:38:21,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:38:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:38:21,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83782745] [2020-10-14 05:38:21,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:38:21,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:38:21,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683182964] [2020-10-14 05:38:21,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:38:21,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:38:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:38:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:38:21,832 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-14 05:38:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:38:21,914 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-14 05:38:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:38:21,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-14 05:38:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:38:21,916 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:38:21,916 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:38:21,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:38:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:38:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-14 05:38:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:38:21,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 05:38:21,922 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2020-10-14 05:38:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:38:21,922 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 05:38:21,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:38:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 05:38:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:38:21,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:38:21,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:38:21,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:38:21,924 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:38:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:38:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2020-10-14 05:38:21,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:38:21,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353497281] [2020-10-14 05:38:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:38:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:38:21,936 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:38:21,936 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:38:21,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:38:21,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:38:21 BoogieIcfgContainer [2020-10-14 05:38:21,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:38:21,960 INFO L168 Benchmark]: Toolchain (without parser) took 3700.87 ms. Allocated memory was 147.3 MB in the beginning and 242.7 MB in the end (delta: 95.4 MB). Free memory was 104.2 MB in the beginning and 203.8 MB in the end (delta: -99.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 05:38:21,961 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 05:38:21,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.15 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:21,963 INFO L168 Benchmark]: Boogie Preprocessor took 111.11 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 94.1 MB in the beginning and 181.7 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:21,964 INFO L168 Benchmark]: RCFGBuilder took 261.23 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:21,965 INFO L168 Benchmark]: TraceAbstraction took 3078.60 ms. Allocated memory was 202.9 MB in the beginning and 242.7 MB in the end (delta: 39.8 MB). Free memory was 168.1 MB in the beginning and 203.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:38:21,968 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.15 ms. Allocated memory is still 147.3 MB. Free memory was 103.8 MB in the beginning and 94.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.11 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 94.1 MB in the beginning and 181.7 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.23 ms. Allocated memory is still 202.9 MB. Free memory was 181.7 MB in the beginning and 169.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3078.60 ms. Allocated memory was 202.9 MB in the beginning and 242.7 MB in the end (delta: 39.8 MB). Free memory was 168.1 MB in the beginning and 203.8 MB in the end (delta: -35.7 MB). Peak memory consumption was 4.1 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: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i