/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:11:55,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:11:55,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:11:55,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:11:55,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:11:55,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:11:55,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:11:55,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:11:55,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:11:55,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:11:55,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:11:55,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:11:55,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:11:55,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:11:55,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:11:55,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:11:55,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:11:55,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:11:55,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:11:55,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:11:55,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:11:55,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:11:55,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:11:55,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:11:55,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:11:55,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:11:55,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:11:55,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:11:55,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:11:55,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:11:55,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:11:55,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:11:55,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:11:55,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:11:55,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:11:55,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:11:55,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:11:55,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:11:55,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:11:55,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:11:55,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:11:55,901 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 [2020-10-15 00:11:55,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:11:55,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:11:55,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:11:55,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:11:55,943 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:11:55,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:11:55,943 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:11:55,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:11:55,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:11:55,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:11:55,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:11:55,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:11:55,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:11:55,946 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:11:55,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:11:55,946 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:11:55,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:11:55,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:11:55,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:11:55,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:11:55,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:11:55,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:11:55,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:11:55,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:11:55,949 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:11:56,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:11:56,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:11:56,249 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:11:56,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:11:56,251 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:11:56,251 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-10-15 00:11:56,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/047452ab7/0eaecc81b90441d4b77b611e5780e37b/FLAG10e3ca608 [2020-10-15 00:11:56,716 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:11:56,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-10-15 00:11:56,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/047452ab7/0eaecc81b90441d4b77b611e5780e37b/FLAG10e3ca608 [2020-10-15 00:11:57,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/047452ab7/0eaecc81b90441d4b77b611e5780e37b [2020-10-15 00:11:57,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:11:57,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:11:57,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:57,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:11:57,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:11:57,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d94f97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57, skipping insertion in model container [2020-10-15 00:11:57,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:11:57,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:11:57,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:57,309 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:11:57,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:11:57,333 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:11:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57 WrapperNode [2020-10-15 00:11:57,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:11:57,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:11:57,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:11:57,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:11:57,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (1/1) ... [2020-10-15 00:11:57,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:11:57,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:11:57,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:11:57,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:11:57,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (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 [2020-10-15 00:11:57,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:11:57,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:11:57,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:11:57,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:11:57,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:11:57,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:11:57,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:11:57,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:11:57,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:11:57,651 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:11:57,651 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:11:57,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:57 BoogieIcfgContainer [2020-10-15 00:11:57,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:11:57,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:11:57,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:11:57,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:11:57,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:11:57" (1/3) ... [2020-10-15 00:11:57,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbcc554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:57, skipping insertion in model container [2020-10-15 00:11:57,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:11:57" (2/3) ... [2020-10-15 00:11:57,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbcc554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:11:57, skipping insertion in model container [2020-10-15 00:11:57,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:11:57" (3/3) ... [2020-10-15 00:11:57,663 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-10-15 00:11:57,673 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:11:57,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:11:57,691 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:11:57,713 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:11:57,714 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:11:57,714 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:11:57,714 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:11:57,714 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:11:57,714 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:11:57,715 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:11:57,715 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:11:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-15 00:11:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:11:57,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:57,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:57,734 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-10-15 00:11:57,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:57,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164932082] [2020-10-15 00:11:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:57,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:57,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:11:57,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:57,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-15 00:11:57,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:57,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:57,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:11:57,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:58,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:58,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:11:58,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:58,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:58,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164932082] [2020-10-15 00:11:58,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:11:58,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 00:11:58,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066938102] [2020-10-15 00:11:58,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:58,063 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-10-15 00:11:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:58,146 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-15 00:11:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:58,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-15 00:11:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:58,159 INFO L225 Difference]: With dead ends: 37 [2020-10-15 00:11:58,160 INFO L226 Difference]: Without dead ends: 13 [2020-10-15 00:11:58,164 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 [2020-10-15 00:11:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-15 00:11:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-15 00:11:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 00:11:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-15 00:11:58,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-15 00:11:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:58,207 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-15 00:11:58,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-15 00:11:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:11:58,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:58,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:58,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:11:58,209 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1244203718, now seen corresponding path program 1 times [2020-10-15 00:11:58,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:58,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806196127] [2020-10-15 00:11:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-15 00:11:58,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-15 00:11:58,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:11:58,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:58,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 00:11:58,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:58,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:58,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 00:11:58,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:58,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:58,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:58,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:11:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:58,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806196127] [2020-10-15 00:11:58,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:58,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:11:58,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699072467] [2020-10-15 00:11:58,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:11:58,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:58,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:11:58,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:58,356 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-15 00:11:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:58,408 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-15 00:11:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:11:58,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-15 00:11:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:58,411 INFO L225 Difference]: With dead ends: 21 [2020-10-15 00:11:58,412 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:11:58,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:11:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:11:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-15 00:11:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-15 00:11:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-15 00:11:58,421 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-15 00:11:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:58,421 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-15 00:11:58,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:11:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-15 00:11:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:11:58,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:58,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:58,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:11:58,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -513951304, now seen corresponding path program 2 times [2020-10-15 00:11:58,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:58,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342743754] [2020-10-15 00:11:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:11:58,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:58,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:58,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:58,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:58,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:58,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:58,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:58,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:58,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:58,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342743754] [2020-10-15 00:11:58,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:58,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:11:58,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919042429] [2020-10-15 00:11:58,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:58,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:58,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:58,613 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-15 00:11:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:58,635 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-15 00:11:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:58,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-15 00:11:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:58,636 INFO L225 Difference]: With dead ends: 23 [2020-10-15 00:11:58,636 INFO L226 Difference]: Without dead ends: 18 [2020-10-15 00:11:58,637 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 [2020-10-15 00:11:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-15 00:11:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-15 00:11:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 00:11:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-15 00:11:58,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-15 00:11:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:58,642 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-15 00:11:58,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-15 00:11:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:11:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:58,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:58,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:11:58,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1178949302, now seen corresponding path program 3 times [2020-10-15 00:11:58,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:58,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027010668] [2020-10-15 00:11:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:11:58,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-15 00:11:58,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:11:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:58,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:11:58,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:11:58,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:58,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:58,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:58,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:58,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027010668] [2020-10-15 00:11:58,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:11:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282096181] [2020-10-15 00:11:58,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:11:58,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:11:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:58,755 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-15 00:11:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:58,784 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-15 00:11:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:11:58,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-15 00:11:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:58,786 INFO L225 Difference]: With dead ends: 25 [2020-10-15 00:11:58,786 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 00:11:58,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 00:11:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-15 00:11:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-15 00:11:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-15 00:11:58,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-15 00:11:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:58,792 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-15 00:11:58,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:11:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-15 00:11:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:11:58,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:58,794 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:58,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:11:58,794 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 263826484, now seen corresponding path program 4 times [2020-10-15 00:11:58,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:58,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737742884] [2020-10-15 00:11:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:11:58,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-15 00:11:58,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:11:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:11:58,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:11:58,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:58,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:58,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:58,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:58,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:58,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:58,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:58,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737742884] [2020-10-15 00:11:58,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:58,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:11:58,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938463025] [2020-10-15 00:11:58,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:11:58,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:11:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:58,981 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-15 00:11:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:59,010 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-15 00:11:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:11:59,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-15 00:11:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:59,012 INFO L225 Difference]: With dead ends: 27 [2020-10-15 00:11:59,012 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:11:59,013 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 [2020-10-15 00:11:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:11:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-15 00:11:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:11:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-15 00:11:59,018 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-15 00:11:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:59,018 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-15 00:11:59,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:11:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-15 00:11:59,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:11:59,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:59,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:59,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:11:59,020 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1299094066, now seen corresponding path program 5 times [2020-10-15 00:11:59,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:59,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047218840] [2020-10-15 00:11:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:11:59,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-15 00:11:59,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:11:59,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:59,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:11:59,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:59,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:59,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:59,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047218840] [2020-10-15 00:11:59,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:59,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:11:59,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715089955] [2020-10-15 00:11:59,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:11:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:11:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:11:59,174 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-15 00:11:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:59,230 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-15 00:11:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:11:59,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-15 00:11:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:59,234 INFO L225 Difference]: With dead ends: 29 [2020-10-15 00:11:59,234 INFO L226 Difference]: Without dead ends: 24 [2020-10-15 00:11:59,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:11:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-15 00:11:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-15 00:11:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:11:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-15 00:11:59,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-15 00:11:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:59,248 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-15 00:11:59,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:11:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-15 00:11:59,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:11:59,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:59,251 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:59,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:11:59,251 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash -241172304, now seen corresponding path program 6 times [2020-10-15 00:11:59,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:59,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820945613] [2020-10-15 00:11:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:11:59,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:59,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:11:59,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:59,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:59,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:59,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820945613] [2020-10-15 00:11:59,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:59,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:11:59,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080220752] [2020-10-15 00:11:59,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:11:59,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:11:59,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:11:59,439 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-15 00:11:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:59,481 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-15 00:11:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:11:59,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-15 00:11:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:59,483 INFO L225 Difference]: With dead ends: 31 [2020-10-15 00:11:59,483 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 00:11:59,484 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 [2020-10-15 00:11:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 00:11:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-15 00:11:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-15 00:11:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-15 00:11:59,491 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-15 00:11:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:59,491 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-15 00:11:59,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:11:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-15 00:11:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:11:59,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:59,492 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:59,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:11:59,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:59,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1326563246, now seen corresponding path program 7 times [2020-10-15 00:11:59,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:59,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069922480] [2020-10-15 00:11:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:11:59,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-15 00:11:59,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:11:59,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:59,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:11:59,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:59,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:59,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:11:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:59,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069922480] [2020-10-15 00:11:59,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:59,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:11:59,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964667257] [2020-10-15 00:11:59,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:11:59,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:11:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:59,665 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-15 00:11:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:59,713 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-15 00:11:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:11:59,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-15 00:11:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:59,715 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:11:59,715 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:11:59,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:11:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:11:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-15 00:11:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-15 00:11:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-15 00:11:59,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-15 00:11:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:59,722 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-15 00:11:59,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:11:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-15 00:11:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:11:59,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:59,724 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:59,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:11:59,724 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 386905900, now seen corresponding path program 8 times [2020-10-15 00:11:59,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:59,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281380037] [2020-10-15 00:11:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:59,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:59,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:59,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:11:59,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:59,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-15 00:11:59,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:59,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:11:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:59,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:11:59,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:00,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:00,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:00,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:00,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:12:00,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:00,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:00,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:00,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:00,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:00,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:00,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:00,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281380037] [2020-10-15 00:12:00,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:00,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:12:00,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282474183] [2020-10-15 00:12:00,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:12:00,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:12:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:12:00,013 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 13 states. [2020-10-15 00:12:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:00,108 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-15 00:12:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:12:00,109 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-15 00:12:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:00,110 INFO L225 Difference]: With dead ends: 34 [2020-10-15 00:12:00,110 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:12:00,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:12:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:12:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-15 00:12:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:12:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-15 00:12:00,115 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-15 00:12:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:00,116 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-15 00:12:00,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:12:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-15 00:12:00,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:12:00,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:00,117 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:00,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:12:00,117 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash -680671446, now seen corresponding path program 9 times [2020-10-15 00:12:00,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:00,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121408635] [2020-10-15 00:12:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:00,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:00,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:00,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:12:00,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:12:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:12:00,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:00,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:12:00,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:00,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:12:00,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121408635] [2020-10-15 00:12:00,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:12:00,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-15 00:12:00,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29321182] [2020-10-15 00:12:00,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:12:00,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:12:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:12:00,284 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-10-15 00:12:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:00,319 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-15 00:12:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:12:00,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-15 00:12:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:00,320 INFO L225 Difference]: With dead ends: 29 [2020-10-15 00:12:00,320 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 00:12:00,320 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 [2020-10-15 00:12:00,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 00:12:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 00:12:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 00:12:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 00:12:00,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-10-15 00:12:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:00,322 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 00:12:00,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:12:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 00:12:00,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 00:12:00,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:12:00,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-15 00:12:00,550 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-15 00:12:00,557 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-15 00:12:00,557 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-15 00:12:00,557 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-15 00:12:00,558 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-15 00:12:00,558 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-15 00:12:00,558 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-15 00:12:00,558 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-10-15 00:12:00,558 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-15 00:12:00,558 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 17) no Hoare annotation was computed. [2020-10-15 00:12:00,558 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-10-15 00:12:00,559 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (= main_~sn~0 0) (<= 1 main_~i~0) (<= main_~i~0 1)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-10-15 00:12:00,559 INFO L264 CegarLoopResult]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (= main_~sn~0 0) (and (<= main_~sn~0 16) (< 15 main_~sn~0))) [2020-10-15 00:12:00,560 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-15 00:12:00,560 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-15 00:12:00,561 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-15 00:12:00,561 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-15 00:12:00,561 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-15 00:12:00,561 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-15 00:12:00,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 12:12:00 BoogieIcfgContainer [2020-10-15 00:12:00,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 00:12:00,605 INFO L168 Benchmark]: Toolchain (without parser) took 3495.24 ms. Allocated memory was 147.8 MB in the beginning and 242.2 MB in the end (delta: 94.4 MB). Free memory was 104.7 MB in the beginning and 209.6 MB in the end (delta: -105.0 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,607 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.50 ms. Allocated memory is still 147.8 MB. Free memory was 104.2 MB in the beginning and 95.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,614 INFO L168 Benchmark]: Boogie Preprocessor took 111.80 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.1 MB in the beginning and 183.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,616 INFO L168 Benchmark]: RCFGBuilder took 207.97 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 172.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,617 INFO L168 Benchmark]: TraceAbstraction took 2946.40 ms. Allocated memory was 205.0 MB in the beginning and 242.2 MB in the end (delta: 37.2 MB). Free memory was 172.3 MB in the beginning and 209.6 MB in the end (delta: -37.3 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-10-15 00:12:00,624 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 223.50 ms. Allocated memory is still 147.8 MB. Free memory was 104.2 MB in the beginning and 95.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.80 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 95.1 MB in the beginning and 183.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 207.97 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 172.3 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2946.40 ms. Allocated memory was 205.0 MB in the beginning and 242.2 MB in the end (delta: 37.2 MB). Free memory was 172.3 MB in the beginning and 209.6 MB in the end (delta: -37.3 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || ((sn == 0 && 1 <= i) && i <= 1)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 10, TraceHistogramMax: 9, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 43 SDslu, 499 SDs, 0 SdLazy, 290 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 10 MinimizatonAttempts, 6 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 28 NumberOfFragments, 128 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 9726 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 81/285 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...