/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:02:14,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:02:14,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:02:14,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:02:14,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:02:14,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:02:14,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:02:14,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:02:14,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:02:14,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:02:14,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:02:14,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:02:14,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:02:14,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:02:14,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:02:14,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:02:14,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:02:14,824 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:02:14,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:02:14,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:02:14,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:02:14,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:02:14,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:02:14,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:02:14,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:02:14,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:02:14,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:02:14,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:02:14,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:02:14,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:02:14,854 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:02:14,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:02:14,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:02:14,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:02:14,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:02:14,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:02:14,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:02:14,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:02:14,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:02:14,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:02:14,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:02:14,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:02:14,920 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:02:14,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:02:14,923 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:02:14,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:02:14,923 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:02:14,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:02:14,924 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:02:14,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:02:14,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:02:14,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:02:14,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:02:14,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:02:14,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:02:14,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:02:14,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:02:14,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:02:14,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:02:14,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:02:14,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:02:14,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:02:14,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:02:14,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:02:14,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:02:14,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:02:14,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:02:14,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:02:14,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:02:14,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:02:14,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:02:14,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:02:15,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:02:15,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:02:15,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:02:15,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:02:15,289 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:02:15,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-13 05:02:15,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edd204ed6/da9d15ddf1c845909faeee5f65b64475/FLAGae61a159d [2020-10-13 05:02:15,819 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:02:15,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2020-10-13 05:02:15,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edd204ed6/da9d15ddf1c845909faeee5f65b64475/FLAGae61a159d [2020-10-13 05:02:16,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/edd204ed6/da9d15ddf1c845909faeee5f65b64475 [2020-10-13 05:02:16,214 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:02:16,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:02:16,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:16,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:02:16,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:02:16,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16, skipping insertion in model container [2020-10-13 05:02:16,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:02:16,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:02:16,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:16,464 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:02:16,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:16,504 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:02:16,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16 WrapperNode [2020-10-13 05:02:16,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:16,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:02:16,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:02:16,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:02:16,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... [2020-10-13 05:02:16,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:02:16,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:02:16,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:02:16,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:02:16,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:02:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:02:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:02:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:02:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:02:16,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:02:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:02:16,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:02:16,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:02:16,935 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:02:16,935 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:02:16,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:16 BoogieIcfgContainer [2020-10-13 05:02:16,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:02:16,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:02:16,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:02:16,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:02:16,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:02:16" (1/3) ... [2020-10-13 05:02:16,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68eeee5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:16, skipping insertion in model container [2020-10-13 05:02:16,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:16" (2/3) ... [2020-10-13 05:02:16,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68eeee5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:16, skipping insertion in model container [2020-10-13 05:02:16,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:16" (3/3) ... [2020-10-13 05:02:16,949 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2020-10-13 05:02:16,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:02:16,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:02:16,990 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:02:17,023 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:02:17,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:02:17,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:02:17,025 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:02:17,025 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:02:17,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:02:17,026 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:02:17,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:02:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-13 05:02:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:02:17,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:17,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:17,068 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2020-10-13 05:02:17,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:17,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382784766] [2020-10-13 05:02:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:17,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:02:17,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:17,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-13 05:02:17,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:17,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:02:17,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:17,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:02:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:17,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:17,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:17,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 05:02:17,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:17,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:17,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:17,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:17,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:17,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382784766] [2020-10-13 05:02:17,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:17,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:02:17,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784482302] [2020-10-13 05:02:17,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:02:17,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:02:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:17,605 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-13 05:02:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:17,692 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-13 05:02:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:02:17,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 05:02:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:17,704 INFO L225 Difference]: With dead ends: 41 [2020-10-13 05:02:17,704 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 05:02:17,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 05:02:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-13 05:02:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 05:02:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 05:02:17,754 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-10-13 05:02:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:17,755 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 05:02:17,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:02:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 05:02:17,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:02:17,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:17,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:17,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:02:17,758 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:17,759 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2020-10-13 05:02:17,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:17,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281229963] [2020-10-13 05:02:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:17,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:17,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:02:18,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-13 05:02:18,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:18,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:18,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:02:18,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:18,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:18,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:18,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:02:18,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:18,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:18,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:02:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:18,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281229963] [2020-10-13 05:02:18,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:18,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:18,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389231499] [2020-10-13 05:02:18,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:18,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:18,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:18,104 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 05:02:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:18,195 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 05:02:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:18,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:02:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:18,197 INFO L225 Difference]: With dead ends: 32 [2020-10-13 05:02:18,197 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:02:18,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:02:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:02:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:02:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 05:02:18,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-13 05:02:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:18,213 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 05:02:18,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 05:02:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:02:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:18,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:18,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:02:18,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2020-10-13 05:02:18,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:18,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803774743] [2020-10-13 05:02:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:02:18,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 05:02:18,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 05:02:18,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:02:18,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:18,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:18,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:18,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:18,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:18,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:18,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803774743] [2020-10-13 05:02:18,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:18,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:18,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052924144] [2020-10-13 05:02:18,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:18,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:18,459 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 05:02:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:18,523 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-13 05:02:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:18,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 05:02:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:18,527 INFO L225 Difference]: With dead ends: 34 [2020-10-13 05:02:18,527 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 05:02:18,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 05:02:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-10-13 05:02:18,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:02:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 05:02:18,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 05:02:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:18,539 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 05:02:18,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 05:02:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:02:18,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:18,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:18,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:02:18,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:18,541 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2020-10-13 05:02:18,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:18,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319169485] [2020-10-13 05:02:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:18,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:18,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:02:18,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-13 05:02:18,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:18,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:19,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:19,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:19,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:19,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:19,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:19,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:19,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:19,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:19,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319169485] [2020-10-13 05:02:19,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:19,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:02:19,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80715238] [2020-10-13 05:02:19,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:19,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:19,027 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-10-13 05:02:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:19,127 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 05:02:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:02:19,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 05:02:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:19,130 INFO L225 Difference]: With dead ends: 38 [2020-10-13 05:02:19,130 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 05:02:19,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 05:02:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-13 05:02:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:02:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 05:02:19,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-10-13 05:02:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:19,141 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 05:02:19,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 05:02:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 05:02:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:19,143 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:19,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:02:19,143 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1302144745, now seen corresponding path program 2 times [2020-10-13 05:02:19,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:19,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484229659] [2020-10-13 05:02:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:19,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 05:02:19,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:19,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-13 05:02:19,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:19,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:02:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:19,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:19,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:19,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:19,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:19,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:19,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:19,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:19,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:19,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:02:19,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484229659] [2020-10-13 05:02:19,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:19,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:02:19,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941249696] [2020-10-13 05:02:19,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:19,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:19,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:19,766 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-13 05:02:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:19,858 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-13 05:02:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:02:19,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 05:02:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:19,860 INFO L225 Difference]: With dead ends: 39 [2020-10-13 05:02:19,860 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:02:19,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:02:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2020-10-13 05:02:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 05:02:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 05:02:19,868 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-10-13 05:02:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:19,868 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 05:02:19,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 05:02:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:02:19,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:19,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:19,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:02:19,870 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash -406079354, now seen corresponding path program 3 times [2020-10-13 05:02:19,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:19,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407803558] [2020-10-13 05:02:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:19,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:20,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:02:20,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-10-13 05:02:20,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:02:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 05:02:20,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:02:20,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:20,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:20,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:20,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:20,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:20,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:20,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:20,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:20,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:02:20,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407803558] [2020-10-13 05:02:20,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:20,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:02:20,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480200582] [2020-10-13 05:02:20,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:02:20,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:02:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:02:20,259 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 05:02:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:20,360 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-13 05:02:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:02:20,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 05:02:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:20,362 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:02:20,362 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:02:20,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:02:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:02:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2020-10-13 05:02:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:02:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 05:02:20,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-13 05:02:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:20,370 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 05:02:20,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:02:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 05:02:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:20,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:20,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:20,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:02:20,371 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash -820912923, now seen corresponding path program 4 times [2020-10-13 05:02:20,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:20,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079491156] [2020-10-13 05:02:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:20,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:20,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:21,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 05:02:21,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-13 05:02:21,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:02:21,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:21,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:02:21,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:21,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:21,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:21,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:21,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:02:21,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:21,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:02:21,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079491156] [2020-10-13 05:02:21,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:21,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:02:21,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988404440] [2020-10-13 05:02:21,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:02:21,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:02:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:21,119 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-10-13 05:02:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:21,222 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-13 05:02:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:02:21,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-13 05:02:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:21,224 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:02:21,224 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:02:21,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:02:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-13 05:02:21,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:02:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 05:02:21,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-13 05:02:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:21,235 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 05:02:21,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:02:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 05:02:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:02:21,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:21,237 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:21,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:02:21,238 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:21,239 INFO L82 PathProgramCache]: Analyzing trace with hash 130000393, now seen corresponding path program 5 times [2020-10-13 05:02:21,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:21,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649332582] [2020-10-13 05:02:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:21,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:21,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:02:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-13 05:02:22,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:02:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:02:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:02:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:22,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:22,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:22,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:22,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:22,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:22,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:22,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:22,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:22,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:22,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 05:02:22,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649332582] [2020-10-13 05:02:22,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:22,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:02:22,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584435615] [2020-10-13 05:02:22,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:02:22,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:02:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:22,186 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-13 05:02:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:22,308 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-13 05:02:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:02:22,309 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 05:02:22,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:22,310 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:02:22,310 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 05:02:22,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 05:02:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-13 05:02:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 05:02:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-13 05:02:22,317 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2020-10-13 05:02:22,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:22,317 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-13 05:02:22,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:02:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-13 05:02:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:02:22,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:22,319 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:22,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:02:22,319 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1912151398, now seen corresponding path program 6 times [2020-10-13 05:02:22,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:22,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138670352] [2020-10-13 05:02:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:22,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:23,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:23,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:23,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-13 05:02:23,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:23,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:23,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:23,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:23,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:23,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:23,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:23,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:23,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:23,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 05:02:23,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138670352] [2020-10-13 05:02:23,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:23,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:02:23,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320602314] [2020-10-13 05:02:23,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:23,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:23,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:23,692 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-13 05:02:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:23,830 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-13 05:02:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:23,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-13 05:02:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:23,833 INFO L225 Difference]: With dead ends: 47 [2020-10-13 05:02:23,833 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:02:23,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:02:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-13 05:02:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:02:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 05:02:23,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-13 05:02:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:23,848 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 05:02:23,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 05:02:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:02:23,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:23,851 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:23,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:02:23,851 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash 911814026, now seen corresponding path program 7 times [2020-10-13 05:02:23,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:23,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238882180] [2020-10-13 05:02:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:23,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:25,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:25,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:02:25,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:25,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-13 05:02:25,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:02:25,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:25,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:25,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:25,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:25,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:25,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:25,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:25,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:02:25,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238882180] [2020-10-13 05:02:25,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:25,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:02:25,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481937177] [2020-10-13 05:02:25,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:25,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:25,465 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-13 05:02:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:25,613 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-13 05:02:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:25,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 05:02:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:25,614 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:02:25,615 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 05:02:25,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 05:02:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2020-10-13 05:02:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:02:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 05:02:25,621 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-13 05:02:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:25,622 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 05:02:25,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 05:02:25,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:02:25,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:25,623 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:25,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:02:25,623 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash 378570245, now seen corresponding path program 8 times [2020-10-13 05:02:25,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:25,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531838527] [2020-10-13 05:02:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:25,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:26,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:27,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:02:27,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:27,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-10-13 05:02:27,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:02:27,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:02:27,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:02:27,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:27,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:27,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:27,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:27,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:27,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:27,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:27,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 05:02:27,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531838527] [2020-10-13 05:02:27,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:27,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:02:27,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120181667] [2020-10-13 05:02:27,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:02:27,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:27,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:02:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:27,345 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-13 05:02:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:27,429 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-13 05:02:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:02:27,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-13 05:02:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:27,431 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:02:27,431 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 05:02:27,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 05:02:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-13 05:02:27,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:02:27,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 05:02:27,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-10-13 05:02:27,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:27,440 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 05:02:27,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:02:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 05:02:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:02:27,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:27,443 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:27,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:02:27,444 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1127030057, now seen corresponding path program 9 times [2020-10-13 05:02:27,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:27,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217688692] [2020-10-13 05:02:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:27,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:28,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:29,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:29,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:02:29,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:29,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-13 05:02:29,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:29,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:02:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:02:29,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:02:29,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:29,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:29,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:29,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:29,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:29,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:29,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:29,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:29,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 05:02:29,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217688692] [2020-10-13 05:02:29,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:29,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:02:29,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273238617] [2020-10-13 05:02:29,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:02:29,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:02:29,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:29,215 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-10-13 05:02:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:29,390 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-13 05:02:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:02:29,391 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-13 05:02:29,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:29,392 INFO L225 Difference]: With dead ends: 59 [2020-10-13 05:02:29,392 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 05:02:29,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:02:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 05:02:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-10-13 05:02:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:02:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 05:02:29,403 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-10-13 05:02:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:29,404 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 05:02:29,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:02:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 05:02:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:29,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:29,407 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:29,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:02:29,407 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1539667386, now seen corresponding path program 10 times [2020-10-13 05:02:29,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:29,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320428058] [2020-10-13 05:02:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:29,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:29,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:31,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:31,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 05:02:31,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:31,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-10-13 05:02:31,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:31,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:02:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:02:31,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:02:31,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:31,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:31,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:31,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:31,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:31,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:31,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:31,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 05:02:31,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320428058] [2020-10-13 05:02:31,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:31,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:02:31,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679345910] [2020-10-13 05:02:31,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:02:31,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:31,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:02:31,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:02:31,488 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-13 05:02:31,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:31,679 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2020-10-13 05:02:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:02:31,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-13 05:02:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:31,681 INFO L225 Difference]: With dead ends: 72 [2020-10-13 05:02:31,681 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:02:31,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:02:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:02:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2020-10-13 05:02:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:02:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 05:02:31,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-13 05:02:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:31,696 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 05:02:31,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:02:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 05:02:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:02:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:31,697 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:31,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:02:31,698 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:31,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:31,699 INFO L82 PathProgramCache]: Analyzing trace with hash -411883739, now seen corresponding path program 11 times [2020-10-13 05:02:31,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:31,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876643947] [2020-10-13 05:02:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:31,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:32,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:34,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:34,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:34,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:34,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2362 [2020-10-13 05:02:34,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:34,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:02:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:02:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:02:34,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:34,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:34,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:34,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:34,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:34,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:34,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:34,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:34,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:34,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:02:34,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876643947] [2020-10-13 05:02:34,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:34,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:02:34,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661769057] [2020-10-13 05:02:34,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:02:34,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:34,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:02:34,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:34,184 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-13 05:02:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:34,370 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-13 05:02:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:02:34,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-13 05:02:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:34,372 INFO L225 Difference]: With dead ends: 78 [2020-10-13 05:02:34,372 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 05:02:34,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 05:02:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2020-10-13 05:02:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:02:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 05:02:34,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-13 05:02:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:34,384 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 05:02:34,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:02:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 05:02:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:02:34,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:34,385 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:34,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:02:34,385 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -959578330, now seen corresponding path program 12 times [2020-10-13 05:02:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:34,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108137749] [2020-10-13 05:02:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:34,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:34,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:37,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:02:37,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:37,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3034 [2020-10-13 05:02:37,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:02:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 05:02:37,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:37,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:37,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:37,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:37,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:37,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:37,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:37,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:37,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:02:37,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108137749] [2020-10-13 05:02:37,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:37,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:02:37,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774651336] [2020-10-13 05:02:37,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:02:37,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:37,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:02:37,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:02:37,561 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-13 05:02:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:37,770 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 05:02:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:02:37,771 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-13 05:02:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:37,772 INFO L225 Difference]: With dead ends: 84 [2020-10-13 05:02:37,772 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:02:37,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:02:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:02:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2020-10-13 05:02:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:02:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-13 05:02:37,783 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-13 05:02:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:37,783 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-13 05:02:37,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:02:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-13 05:02:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:02:37,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:37,786 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:37,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:02:37,786 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:37,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1380204475, now seen corresponding path program 13 times [2020-10-13 05:02:37,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:37,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948689127] [2020-10-13 05:02:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:39,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:41,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:41,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 05:02:41,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3372 [2020-10-13 05:02:41,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:02:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:02:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:02:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:41,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:41,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:41,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:41,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:41,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:41,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:41,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:41,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:41,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 05:02:41,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948689127] [2020-10-13 05:02:41,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:41,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:02:41,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760942616] [2020-10-13 05:02:41,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:02:41,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:41,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:02:41,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:02:41,324 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-13 05:02:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:41,539 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2020-10-13 05:02:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:02:41,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-13 05:02:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:41,541 INFO L225 Difference]: With dead ends: 90 [2020-10-13 05:02:41,541 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:02:41,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:02:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:02:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-10-13 05:02:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 05:02:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-13 05:02:41,555 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-13 05:02:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:41,556 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-13 05:02:41,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:02:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-13 05:02:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:02:41,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:41,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:41,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:02:41,560 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2054257670, now seen corresponding path program 14 times [2020-10-13 05:02:41,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:41,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053917688] [2020-10-13 05:02:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:41,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:41,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:42,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:44,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2965 [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 05:02:44,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:02:44,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:44,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:44,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:44,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:44,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:44,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:44,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:44,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-13 05:02:44,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053917688] [2020-10-13 05:02:44,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:44,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:02:44,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725547202] [2020-10-13 05:02:44,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:02:44,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:02:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:44,686 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2020-10-13 05:02:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:44,891 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-10-13 05:02:44,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:02:44,892 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 05:02:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:44,893 INFO L225 Difference]: With dead ends: 96 [2020-10-13 05:02:44,893 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:02:44,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:02:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:02:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 41. [2020-10-13 05:02:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:02:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 05:02:44,909 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-13 05:02:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:44,909 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 05:02:44,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:02:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 05:02:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 05:02:44,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:44,910 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:44,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:02:44,910 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1290555749, now seen corresponding path program 15 times [2020-10-13 05:02:44,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:44,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863747274] [2020-10-13 05:02:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:44,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:48,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:48,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 05:02:48,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:48,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3659 [2020-10-13 05:02:48,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:02:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:02:48,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 05:02:48,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:48,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:48,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:48,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:48,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:48,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:48,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:48,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:48,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 05:02:48,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863747274] [2020-10-13 05:02:48,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:48,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:02:48,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124097357] [2020-10-13 05:02:48,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:02:48,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:02:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:48,742 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2020-10-13 05:02:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:49,025 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-10-13 05:02:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:02:49,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-10-13 05:02:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:49,027 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:02:49,027 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 05:02:49,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:02:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 05:02:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2020-10-13 05:02:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:02:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-13 05:02:49,034 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-13 05:02:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:49,034 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-13 05:02:49,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:02:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-13 05:02:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:02:49,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:49,035 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:49,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:02:49,035 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:49,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1738342170, now seen corresponding path program 16 times [2020-10-13 05:02:49,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:49,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923660797] [2020-10-13 05:02:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:49,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4284 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:02:53,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:53,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:53,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:53,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:53,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:53,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:53,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:53,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 05:02:53,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923660797] [2020-10-13 05:02:53,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:53,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:02:53,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291861856] [2020-10-13 05:02:53,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:02:53,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:02:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:02:53,500 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-13 05:02:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:53,818 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-13 05:02:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:02:53,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 05:02:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:53,821 INFO L225 Difference]: With dead ends: 108 [2020-10-13 05:02:53,821 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 05:02:53,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:02:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 05:02:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-10-13 05:02:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 05:02:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 05:02:53,828 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-13 05:02:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:53,828 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 05:02:53,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:02:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 05:02:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:02:53,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:53,829 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:53,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:02:53,829 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1074190981, now seen corresponding path program 17 times [2020-10-13 05:02:53,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:53,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999983693] [2020-10-13 05:02:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:53,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:55,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:02:58,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:58,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4864 [2020-10-13 05:02:58,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:02:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:02:58,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 05:02:58,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:58,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:58,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:58,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-13 05:02:58,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999983693] [2020-10-13 05:02:58,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:58,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:02:58,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626113977] [2020-10-13 05:02:58,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:02:58,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:02:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:02:58,896 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-10-13 05:02:59,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:59,208 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2020-10-13 05:02:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:02:59,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-13 05:02:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:59,210 INFO L225 Difference]: With dead ends: 114 [2020-10-13 05:02:59,210 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 05:02:59,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:02:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 05:02:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 47. [2020-10-13 05:02:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 05:02:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 05:02:59,217 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-13 05:02:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:59,217 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 05:02:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:02:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 05:02:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 05:02:59,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:59,219 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:02:59,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:02:59,220 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:59,220 INFO L82 PathProgramCache]: Analyzing trace with hash 308317638, now seen corresponding path program 18 times [2020-10-13 05:02:59,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:59,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996747501] [2020-10-13 05:02:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:59,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:04,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 05:03:04,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:04,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:03:04,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:03:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:04,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:04,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:04,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:04,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:04,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:04,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:04,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:04,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:04,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:04,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 05:03:04,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996747501] [2020-10-13 05:03:04,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:04,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:03:04,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787037887] [2020-10-13 05:03:04,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:03:04,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:03:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:04,438 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2020-10-13 05:03:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:04,608 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-13 05:03:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:04,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-13 05:03:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:04,610 INFO L225 Difference]: With dead ends: 80 [2020-10-13 05:03:04,610 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 05:03:04,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 05:03:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-13 05:03:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 05:03:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 05:03:04,616 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2020-10-13 05:03:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:04,616 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 05:03:04,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:03:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 05:03:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:03:04,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:04,617 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:04,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:03:04,617 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:04,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:04,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1000023018, now seen corresponding path program 19 times [2020-10-13 05:03:04,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:04,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933735086] [2020-10-13 05:03:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:09,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:09,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:09,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:09,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:09,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:09,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:09,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 05:03:09,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933735086] [2020-10-13 05:03:09,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:09,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:03:09,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85526321] [2020-10-13 05:03:09,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:03:09,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:03:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:09,826 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 18 states. [2020-10-13 05:03:10,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:10,174 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2020-10-13 05:03:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:10,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-13 05:03:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:10,177 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:03:10,178 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:03:10,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:03:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:03:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 49. [2020-10-13 05:03:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:03:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-13 05:03:10,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2020-10-13 05:03:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:10,184 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-13 05:03:10,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:03:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-13 05:03:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:03:10,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:10,185 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:10,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:03:10,185 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1181918299, now seen corresponding path program 20 times [2020-10-13 05:03:10,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:10,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476124461] [2020-10-13 05:03:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:10,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:15,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 05:03:15,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:03:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:15,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:15,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:15,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:15,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:15,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:15,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:15,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:15,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-13 05:03:15,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476124461] [2020-10-13 05:03:15,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:15,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:03:15,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007524897] [2020-10-13 05:03:15,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:03:15,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:03:15,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:15,428 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-13 05:03:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:15,764 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2020-10-13 05:03:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:03:15,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-13 05:03:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:15,767 INFO L225 Difference]: With dead ends: 126 [2020-10-13 05:03:15,767 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 05:03:15,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:03:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 05:03:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 51. [2020-10-13 05:03:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 05:03:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-13 05:03:15,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2020-10-13 05:03:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:15,781 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-13 05:03:15,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:03:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-13 05:03:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:03:15,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:15,782 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:15,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:03:15,782 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -760733018, now seen corresponding path program 21 times [2020-10-13 05:03:15,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:15,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344075719] [2020-10-13 05:03:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:20,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:03:20,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:03:20,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:21,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:21,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:21,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:21,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-13 05:03:21,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344075719] [2020-10-13 05:03:21,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:21,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:03:21,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979676128] [2020-10-13 05:03:21,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:03:21,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:03:21,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:21,107 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-13 05:03:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:21,508 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-13 05:03:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:03:21,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-10-13 05:03:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:21,510 INFO L225 Difference]: With dead ends: 132 [2020-10-13 05:03:21,510 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:03:21,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:03:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 53. [2020-10-13 05:03:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:03:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 05:03:21,516 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2020-10-13 05:03:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:21,517 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 05:03:21,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:03:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 05:03:21,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 05:03:21,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:21,518 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:21,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:03:21,518 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1014901563, now seen corresponding path program 22 times [2020-10-13 05:03:21,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:21,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650550683] [2020-10-13 05:03:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:21,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:21,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:26,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:26,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:26,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 05:03:26,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:03:26,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:03:26,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:03:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:26,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:03:26,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:26,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:26,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:26,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:26,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-13 05:03:26,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650550683] [2020-10-13 05:03:26,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:26,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:03:26,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684046673] [2020-10-13 05:03:26,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:03:26,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:03:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:26,797 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-10-13 05:03:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:27,022 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2020-10-13 05:03:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:03:27,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 49 [2020-10-13 05:03:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:27,024 INFO L225 Difference]: With dead ends: 92 [2020-10-13 05:03:27,024 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 05:03:27,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 05:03:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-13 05:03:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:03:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-13 05:03:27,030 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2020-10-13 05:03:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:27,030 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-13 05:03:27,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:03:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-13 05:03:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:03:27,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:27,031 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:27,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:03:27,031 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -262914071, now seen corresponding path program 23 times [2020-10-13 05:03:27,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:27,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157604249] [2020-10-13 05:03:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:27,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:03:32,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:32,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:32,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:32,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:32,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:32,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:32,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:32,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:32,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:03:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 05:03:32,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157604249] [2020-10-13 05:03:32,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:32,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:03:32,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194613409] [2020-10-13 05:03:32,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:03:32,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:32,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:03:32,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:32,344 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 21 states. [2020-10-13 05:03:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:32,754 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-13 05:03:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:03:32,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-13 05:03:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:32,757 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:03:32,757 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:03:32,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:03:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:03:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 55. [2020-10-13 05:03:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:03:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 05:03:32,764 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-10-13 05:03:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:32,764 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 05:03:32,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:03:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 05:03:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:03:32,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:32,765 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:32,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:03:32,765 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1678262394, now seen corresponding path program 24 times [2020-10-13 05:03:32,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:32,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238748841] [2020-10-13 05:03:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:37,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:37,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:03:37,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:38,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:38,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:38,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:38,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:38,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 05:03:38,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238748841] [2020-10-13 05:03:38,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:38,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:03:38,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615823658] [2020-10-13 05:03:38,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:03:38,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:38,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:03:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:38,079 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-13 05:03:38,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:38,291 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-13 05:03:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:03:38,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 51 [2020-10-13 05:03:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:38,292 INFO L225 Difference]: With dead ends: 95 [2020-10-13 05:03:38,293 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 05:03:38,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 05:03:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2020-10-13 05:03:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 05:03:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 05:03:38,298 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-10-13 05:03:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:38,298 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 05:03:38,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:03:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 05:03:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:03:38,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:38,299 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:38,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:03:38,299 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:38,300 INFO L82 PathProgramCache]: Analyzing trace with hash -572788310, now seen corresponding path program 25 times [2020-10-13 05:03:38,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:38,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929707225] [2020-10-13 05:03:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:38,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:03:43,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:03:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:43,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:43,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 05:03:43,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929707225] [2020-10-13 05:03:43,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:43,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:03:43,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888768651] [2020-10-13 05:03:43,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:03:43,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:03:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:43,601 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 22 states. [2020-10-13 05:03:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:43,993 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2020-10-13 05:03:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:03:43,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-13 05:03:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:43,996 INFO L225 Difference]: With dead ends: 124 [2020-10-13 05:03:43,996 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 05:03:43,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:03:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 05:03:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2020-10-13 05:03:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 05:03:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-13 05:03:44,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2020-10-13 05:03:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:44,003 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-13 05:03:44,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:03:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-13 05:03:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:03:44,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:44,004 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:44,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:03:44,004 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1600538085, now seen corresponding path program 26 times [2020-10-13 05:03:44,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:44,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329552282] [2020-10-13 05:03:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:49,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:03:49,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:49,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:03:49,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:03:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:03:49,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:03:49,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:49,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:49,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:49,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:49,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-13 05:03:49,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329552282] [2020-10-13 05:03:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:49,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:03:49,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977146610] [2020-10-13 05:03:49,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:03:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:03:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:03:49,329 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2020-10-13 05:03:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:49,554 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2020-10-13 05:03:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:03:49,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-10-13 05:03:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:49,556 INFO L225 Difference]: With dead ends: 98 [2020-10-13 05:03:49,556 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 05:03:49,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:03:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 05:03:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-10-13 05:03:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:03:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-13 05:03:49,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-10-13 05:03:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:49,562 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-13 05:03:49,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:03:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-13 05:03:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:03:49,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:49,563 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:49,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:03:49,563 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1190756599, now seen corresponding path program 27 times [2020-10-13 05:03:49,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:49,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767343668] [2020-10-13 05:03:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 05:03:54,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:54,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:54,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:54,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:54,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:54,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:54,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:54,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:54,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:54,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:03:54,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767343668] [2020-10-13 05:03:54,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:54,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:03:54,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051830400] [2020-10-13 05:03:54,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:03:54,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:03:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:03:54,898 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-13 05:03:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:55,298 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-10-13 05:03:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:03:55,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-13 05:03:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:55,301 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:03:55,301 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 05:03:55,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:03:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 05:03:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 59. [2020-10-13 05:03:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 05:03:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 05:03:55,307 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2020-10-13 05:03:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:55,308 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 05:03:55,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:03:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 05:03:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 05:03:55,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:55,309 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:55,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:03:55,309 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash -376609690, now seen corresponding path program 28 times [2020-10-13 05:03:55,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:55,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014195778] [2020-10-13 05:03:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:00,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:00,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 05:04:00,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:00,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:04:00,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:04:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 05:04:00,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:04:00,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:00,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:00,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:00,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:00,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:00,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 05:04:00,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014195778] [2020-10-13 05:04:00,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:00,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:04:00,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048257170] [2020-10-13 05:04:00,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:04:00,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:00,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:04:00,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:00,657 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-13 05:04:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:01,110 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2020-10-13 05:04:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:04:01,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-13 05:04:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:01,114 INFO L225 Difference]: With dead ends: 156 [2020-10-13 05:04:01,114 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:04:01,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:04:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:04:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 61. [2020-10-13 05:04:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:04:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-13 05:04:01,120 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-10-13 05:04:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:01,121 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-13 05:04:01,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:04:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-13 05:04:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:04:01,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:01,122 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:01,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:04:01,122 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1505972475, now seen corresponding path program 29 times [2020-10-13 05:04:01,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:01,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076647678] [2020-10-13 05:04:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:01,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:01,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:06,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 05:04:06,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:04:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:06,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:06,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:06,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:06,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:06,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-13 05:04:06,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076647678] [2020-10-13 05:04:06,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:06,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:04:06,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120711150] [2020-10-13 05:04:06,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:04:06,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:04:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:06,504 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2020-10-13 05:04:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:06,687 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2020-10-13 05:04:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:04:06,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-10-13 05:04:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:06,688 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:04:06,688 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 05:04:06,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 05:04:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2020-10-13 05:04:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:04:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-13 05:04:06,693 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-10-13 05:04:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:06,694 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-13 05:04:06,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:04:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-13 05:04:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:04:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:06,695 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:06,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:04:06,695 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1427355177, now seen corresponding path program 30 times [2020-10-13 05:04:06,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:06,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084310421] [2020-10-13 05:04:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:06,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:11,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:04:11,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 05:04:11,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:04:11,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:12,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:12,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:12,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:12,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:12,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:12,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 05:04:12,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084310421] [2020-10-13 05:04:12,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:12,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:04:12,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731926108] [2020-10-13 05:04:12,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:04:12,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:04:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:12,094 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-13 05:04:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:12,626 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2020-10-13 05:04:12,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:04:12,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-13 05:04:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:12,628 INFO L225 Difference]: With dead ends: 139 [2020-10-13 05:04:12,628 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 05:04:12,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:04:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 05:04:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 63. [2020-10-13 05:04:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 05:04:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 05:04:12,643 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2020-10-13 05:04:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:12,643 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 05:04:12,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:04:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 05:04:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:04:12,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:12,644 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:12,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:04:12,644 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash -819523258, now seen corresponding path program 31 times [2020-10-13 05:04:12,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:12,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094047829] [2020-10-13 05:04:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:12,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:12,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:17,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:04:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:18,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:18,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:18,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:18,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:18,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:18,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:18,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:18,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-13 05:04:18,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094047829] [2020-10-13 05:04:18,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:18,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:04:18,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945958655] [2020-10-13 05:04:18,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:04:18,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:04:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:18,047 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2020-10-13 05:04:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:18,294 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-10-13 05:04:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:04:18,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-10-13 05:04:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:18,296 INFO L225 Difference]: With dead ends: 107 [2020-10-13 05:04:18,296 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 05:04:18,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 05:04:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-10-13 05:04:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:04:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-13 05:04:18,302 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-10-13 05:04:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:18,302 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-13 05:04:18,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:04:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-13 05:04:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:04:18,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:18,303 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:18,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:04:18,303 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash 609804138, now seen corresponding path program 32 times [2020-10-13 05:04:18,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:18,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676889445] [2020-10-13 05:04:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:18,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:23,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:04:23,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:04:23,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:04:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:04:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:04:23,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:23,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:23,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:23,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:23,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-13 05:04:23,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676889445] [2020-10-13 05:04:23,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:23,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:04:23,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856800398] [2020-10-13 05:04:23,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:04:23,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:23,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:04:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:23,713 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2020-10-13 05:04:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:24,164 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2020-10-13 05:04:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:04:24,166 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-13 05:04:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:24,167 INFO L225 Difference]: With dead ends: 144 [2020-10-13 05:04:24,168 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 05:04:24,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 05:04:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2020-10-13 05:04:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 05:04:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 05:04:24,174 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2020-10-13 05:04:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:24,174 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 05:04:24,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:04:24,174 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 05:04:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 05:04:24,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:24,175 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:24,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:04:24,175 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:24,176 INFO L82 PathProgramCache]: Analyzing trace with hash -393801691, now seen corresponding path program 33 times [2020-10-13 05:04:24,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:24,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459687505] [2020-10-13 05:04:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:29,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 05:04:29,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:04:29,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:29,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:29,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:29,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:29,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:29,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:29,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-13 05:04:29,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459687505] [2020-10-13 05:04:29,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:29,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:04:29,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024651274] [2020-10-13 05:04:29,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:04:29,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:29,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:04:29,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:29,625 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2020-10-13 05:04:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:30,354 INFO L93 Difference]: Finished difference Result 174 states and 203 transitions. [2020-10-13 05:04:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:04:30,355 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-13 05:04:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:30,357 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:04:30,357 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:04:30,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:04:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:04:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 67. [2020-10-13 05:04:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:04:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 05:04:30,371 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-13 05:04:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:30,372 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 05:04:30,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:04:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 05:04:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:04:30,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:30,376 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:30,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:04:30,376 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:30,377 INFO L82 PathProgramCache]: Analyzing trace with hash -654129626, now seen corresponding path program 34 times [2020-10-13 05:04:30,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:30,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603428490] [2020-10-13 05:04:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:30,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:35,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:04:35,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:35,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:35,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:35,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:35,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:35,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:35,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 05:04:35,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603428490] [2020-10-13 05:04:35,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:35,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:04:35,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200442508] [2020-10-13 05:04:35,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:04:35,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:35,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:04:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:35,915 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2020-10-13 05:04:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:36,158 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-13 05:04:36,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:04:36,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-13 05:04:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:36,159 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:04:36,160 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:04:36,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:04:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-13 05:04:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:04:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-13 05:04:36,166 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-10-13 05:04:36,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:36,166 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-13 05:04:36,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:04:36,166 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-13 05:04:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:04:36,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:36,167 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:36,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:04:36,168 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash -2036800950, now seen corresponding path program 35 times [2020-10-13 05:04:36,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:36,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847767206] [2020-10-13 05:04:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:36,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:04:41,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 05:04:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:04:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:41,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-13 05:04:41,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847767206] [2020-10-13 05:04:41,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:41,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:04:41,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301833806] [2020-10-13 05:04:41,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:04:41,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:41,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:04:41,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:41,648 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 28 states. [2020-10-13 05:04:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:42,145 INFO L93 Difference]: Finished difference Result 154 states and 182 transitions. [2020-10-13 05:04:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:04:42,146 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-13 05:04:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:42,148 INFO L225 Difference]: With dead ends: 154 [2020-10-13 05:04:42,148 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 05:04:42,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:04:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 05:04:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 69. [2020-10-13 05:04:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 05:04:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-13 05:04:42,155 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-10-13 05:04:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:42,155 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-13 05:04:42,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:04:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-13 05:04:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:04:42,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:42,156 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:42,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 05:04:42,156 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -834180795, now seen corresponding path program 36 times [2020-10-13 05:04:42,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:42,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870514203] [2020-10-13 05:04:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:47,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:47,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:04:47,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:47,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:47,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:47,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:47,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-13 05:04:47,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870514203] [2020-10-13 05:04:47,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:47,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:04:47,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870341211] [2020-10-13 05:04:47,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:04:47,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:04:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:47,674 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2020-10-13 05:04:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:47,970 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2020-10-13 05:04:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:04:47,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-10-13 05:04:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:47,972 INFO L225 Difference]: With dead ends: 119 [2020-10-13 05:04:47,972 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:04:47,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:04:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-10-13 05:04:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:04:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 05:04:47,979 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2020-10-13 05:04:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 05:04:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:04:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 05:04:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:04:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:47,980 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:47,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 05:04:47,981 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1858538601, now seen corresponding path program 37 times [2020-10-13 05:04:47,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:47,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004876099] [2020-10-13 05:04:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:48,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:53,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:53,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:04:53,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 05:04:53,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:53,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:53,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:53,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 05:04:53,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004876099] [2020-10-13 05:04:53,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:53,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:04:53,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088357754] [2020-10-13 05:04:53,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:04:53,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:53,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:04:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:53,494 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 29 states. [2020-10-13 05:04:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:54,084 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-10-13 05:04:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:04:54,084 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-13 05:04:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:54,086 INFO L225 Difference]: With dead ends: 159 [2020-10-13 05:04:54,087 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:04:54,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:04:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2020-10-13 05:04:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 05:04:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 05:04:54,093 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-13 05:04:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:54,093 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 05:04:54,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:04:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 05:04:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 05:04:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:54,094 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:54,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 05:04:54,094 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:54,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -337739002, now seen corresponding path program 38 times [2020-10-13 05:04:54,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:54,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579790200] [2020-10-13 05:04:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:54,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:59,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:59,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:04:59,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:59,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:59,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:59,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:59,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:59,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:59,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:59,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-13 05:04:59,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579790200] [2020-10-13 05:04:59,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:59,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:04:59,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636837422] [2020-10-13 05:04:59,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:04:59,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:04:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:04:59,641 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2020-10-13 05:05:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:00,291 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2020-10-13 05:05:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:05:00,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-13 05:05:00,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:00,293 INFO L225 Difference]: With dead ends: 192 [2020-10-13 05:05:00,293 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 05:05:00,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:05:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 05:05:00,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 73. [2020-10-13 05:05:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:05:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-13 05:05:00,299 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-13 05:05:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:00,300 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-13 05:05:00,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:05:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-13 05:05:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:05:00,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:00,301 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:00,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 05:05:00,301 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:00,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1996470885, now seen corresponding path program 39 times [2020-10-13 05:05:00,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:00,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590709394] [2020-10-13 05:05:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 05:05:05,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:05,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:05:05,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:05:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:05,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:05:05,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:05,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:05,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:05,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:05,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:05,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:05,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:05,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:05,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-13 05:05:05,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590709394] [2020-10-13 05:05:05,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:05,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:05:05,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667819247] [2020-10-13 05:05:05,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:05:05,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:05:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:05,888 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2020-10-13 05:05:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:06,179 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 05:05:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:05:06,180 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2020-10-13 05:05:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:06,181 INFO L225 Difference]: With dead ends: 125 [2020-10-13 05:05:06,181 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 05:05:06,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 05:05:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-10-13 05:05:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:05:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 05:05:06,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2020-10-13 05:05:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:06,188 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 05:05:06,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:05:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 05:05:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:05:06,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:06,189 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:06,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 05:05:06,189 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1158599799, now seen corresponding path program 40 times [2020-10-13 05:05:06,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:06,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734645372] [2020-10-13 05:05:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:11,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:11,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:05:11,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:11,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:05:11,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:05:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 05:05:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:05:11,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:11,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:11,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:11,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:11,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:11,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:11,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:11,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:11,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 05:05:11,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734645372] [2020-10-13 05:05:11,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:11,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:05:11,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969673540] [2020-10-13 05:05:11,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:05:11,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:11,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:05:11,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:11,797 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 31 states. [2020-10-13 05:05:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:12,518 INFO L93 Difference]: Finished difference Result 169 states and 200 transitions. [2020-10-13 05:05:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:05:12,519 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-13 05:05:12,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:12,521 INFO L225 Difference]: With dead ends: 169 [2020-10-13 05:05:12,521 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 05:05:12,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:05:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 05:05:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 75. [2020-10-13 05:05:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 05:05:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-13 05:05:12,529 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-13 05:05:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:12,529 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-13 05:05:12,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:05:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-13 05:05:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:05:12,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:12,530 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:12,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 05:05:12,530 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash 620251110, now seen corresponding path program 41 times [2020-10-13 05:05:12,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:12,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529605557] [2020-10-13 05:05:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:12,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:17,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:05:17,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:18,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:18,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:18,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:18,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:18,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:18,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-13 05:05:18,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529605557] [2020-10-13 05:05:18,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:18,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:05:18,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776334943] [2020-10-13 05:05:18,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:05:18,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:18,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:05:18,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:05:18,155 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2020-10-13 05:05:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:18,734 INFO L93 Difference]: Finished difference Result 204 states and 238 transitions. [2020-10-13 05:05:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:05:18,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-13 05:05:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:18,736 INFO L225 Difference]: With dead ends: 204 [2020-10-13 05:05:18,736 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 05:05:18,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:05:18,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 05:05:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 77. [2020-10-13 05:05:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 05:05:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 05:05:18,743 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-13 05:05:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:18,743 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 05:05:18,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:05:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 05:05:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 05:05:18,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:18,745 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:18,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 05:05:18,745 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1716386939, now seen corresponding path program 42 times [2020-10-13 05:05:18,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:18,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158343055] [2020-10-13 05:05:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:18,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:19,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:23,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:05:23,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:24,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:24,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:24,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:24,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:24,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-13 05:05:24,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158343055] [2020-10-13 05:05:24,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:24,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:05:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892241991] [2020-10-13 05:05:24,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:05:24,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:05:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:24,404 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2020-10-13 05:05:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:25,193 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2020-10-13 05:05:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:05:25,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-10-13 05:05:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:25,195 INFO L225 Difference]: With dead ends: 210 [2020-10-13 05:05:25,195 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 05:05:25,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:05:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 05:05:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 79. [2020-10-13 05:05:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:05:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-13 05:05:25,203 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-13 05:05:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:25,204 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-13 05:05:25,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:05:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-13 05:05:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:05:25,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:25,205 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:25,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 05:05:25,205 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:25,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1173482298, now seen corresponding path program 43 times [2020-10-13 05:05:25,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:25,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13716309] [2020-10-13 05:05:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:25,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:30,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:30,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 05:05:30,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:30,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:05:30,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:30,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:05:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:30,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:05:30,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:30,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:30,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:30,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-13 05:05:30,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13716309] [2020-10-13 05:05:30,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:30,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:05:30,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934970119] [2020-10-13 05:05:30,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:05:30,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:05:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:30,969 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2020-10-13 05:05:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:31,237 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-13 05:05:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:05:31,238 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2020-10-13 05:05:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:31,239 INFO L225 Difference]: With dead ends: 134 [2020-10-13 05:05:31,239 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 05:05:31,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 05:05:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-10-13 05:05:31,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:05:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-13 05:05:31,244 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2020-10-13 05:05:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:31,245 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-13 05:05:31,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:05:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-13 05:05:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 05:05:31,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:31,246 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:31,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 05:05:31,246 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:31,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:31,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1782113558, now seen corresponding path program 44 times [2020-10-13 05:05:31,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:31,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999903024] [2020-10-13 05:05:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:31,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:36,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:05:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 05:05:36,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:05:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:36,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:36,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:36,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:36,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:36,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:36,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:36,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:36,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:36,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:36,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-13 05:05:36,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999903024] [2020-10-13 05:05:36,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:36,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:05:36,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298610810] [2020-10-13 05:05:36,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:05:36,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:05:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:36,903 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 34 states. [2020-10-13 05:05:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:37,651 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2020-10-13 05:05:37,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:05:37,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-13 05:05:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:37,654 INFO L225 Difference]: With dead ends: 184 [2020-10-13 05:05:37,654 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 05:05:37,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:05:37,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 05:05:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 81. [2020-10-13 05:05:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:05:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-13 05:05:37,662 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 76 [2020-10-13 05:05:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:37,663 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-13 05:05:37,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:05:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-13 05:05:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:05:37,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:37,664 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:37,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 05:05:37,664 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1528806235, now seen corresponding path program 45 times [2020-10-13 05:05:37,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:37,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065764066] [2020-10-13 05:05:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:38,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:42,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:05:42,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:05:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:43,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:43,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:43,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:43,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-13 05:05:43,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065764066] [2020-10-13 05:05:43,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:43,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:05:43,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315813165] [2020-10-13 05:05:43,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:05:43,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:43,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:05:43,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:43,421 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2020-10-13 05:05:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:43,643 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2020-10-13 05:05:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:05:43,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 77 [2020-10-13 05:05:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:43,645 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:05:43,645 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 05:05:43,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 05:05:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-10-13 05:05:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:05:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 05:05:43,651 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2020-10-13 05:05:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:43,651 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 05:05:43,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:05:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 05:05:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:05:43,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:43,652 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:43,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 05:05:43,653 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:43,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1987072457, now seen corresponding path program 46 times [2020-10-13 05:05:43,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:43,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094845408] [2020-10-13 05:05:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:43,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:44,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:48,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 05:05:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:49,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:49,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:49,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:49,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 05:05:49,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094845408] [2020-10-13 05:05:49,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:49,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:05:49,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105236088] [2020-10-13 05:05:49,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:05:49,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:49,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:05:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:49,417 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 35 states. [2020-10-13 05:05:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:50,259 INFO L93 Difference]: Finished difference Result 189 states and 224 transitions. [2020-10-13 05:05:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:05:50,260 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-13 05:05:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:50,262 INFO L225 Difference]: With dead ends: 189 [2020-10-13 05:05:50,262 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 05:05:50,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 05:05:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2020-10-13 05:05:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:05:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 05:05:50,276 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-10-13 05:05:50,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:50,277 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 05:05:50,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:05:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 05:05:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 05:05:50,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:50,279 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:50,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 05:05:50,279 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash -648156762, now seen corresponding path program 47 times [2020-10-13 05:05:50,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:50,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227512056] [2020-10-13 05:05:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 05:05:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:05:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:05:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:05:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 05:05:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:05:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:56,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:56,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-13 05:05:56,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227512056] [2020-10-13 05:05:56,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:56,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:05:56,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640116954] [2020-10-13 05:05:56,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:05:56,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:05:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:05:56,064 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2020-10-13 05:05:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:56,770 INFO L93 Difference]: Finished difference Result 228 states and 266 transitions. [2020-10-13 05:05:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:05:56,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 79 [2020-10-13 05:05:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:56,772 INFO L225 Difference]: With dead ends: 228 [2020-10-13 05:05:56,772 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 05:05:56,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:05:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 05:05:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 85. [2020-10-13 05:05:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:05:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-13 05:05:56,781 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-13 05:05:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:56,781 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-13 05:05:56,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:05:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-13 05:05:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:05:56,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:56,784 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:56,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 05:05:56,784 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -561218107, now seen corresponding path program 48 times [2020-10-13 05:05:56,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:56,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905860671] [2020-10-13 05:05:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:56,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:01,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:01,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 05:06:01,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:01,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:06:01,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:06:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 05:06:01,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:06:01,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:02,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:02,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:02,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:02,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:02,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:02,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:02,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-13 05:06:02,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905860671] [2020-10-13 05:06:02,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:02,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:06:02,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454196575] [2020-10-13 05:06:02,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:06:02,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:02,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:06:02,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:06:02,603 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2020-10-13 05:06:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:03,508 INFO L93 Difference]: Finished difference Result 234 states and 273 transitions. [2020-10-13 05:06:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:06:03,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2020-10-13 05:06:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:03,510 INFO L225 Difference]: With dead ends: 234 [2020-10-13 05:06:03,510 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:06:03,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:06:03,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:06:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 87. [2020-10-13 05:06:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 05:06:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-13 05:06:03,516 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-13 05:06:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:03,517 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-13 05:06:03,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:06:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-13 05:06:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:06:03,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:03,518 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:03,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 05:06:03,518 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1985624442, now seen corresponding path program 49 times [2020-10-13 05:06:03,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:03,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112632596] [2020-10-13 05:06:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:03,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:07,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:08,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:08,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 05:06:08,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:09,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:09,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:09,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:09,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:09,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:09,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:09,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:09,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:09,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-13 05:06:09,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112632596] [2020-10-13 05:06:09,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:09,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:06:09,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478036945] [2020-10-13 05:06:09,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:06:09,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:09,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:06:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:06:09,375 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2020-10-13 05:06:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:10,140 INFO L93 Difference]: Finished difference Result 240 states and 280 transitions. [2020-10-13 05:06:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:06:10,141 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2020-10-13 05:06:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:10,143 INFO L225 Difference]: With dead ends: 240 [2020-10-13 05:06:10,143 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 05:06:10,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:06:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 05:06:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 89. [2020-10-13 05:06:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 05:06:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-13 05:06:10,149 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-10-13 05:06:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:10,150 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-13 05:06:10,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 05:06:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-13 05:06:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 05:06:10,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:10,151 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:10,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 05:06:10,151 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2076659995, now seen corresponding path program 50 times [2020-10-13 05:06:10,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:10,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627261479] [2020-10-13 05:06:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:11,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:15,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:15,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 05:06:15,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:15,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-13 05:06:15,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:15,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:06:15,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 05:06:15,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:06:15,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:16,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:16,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:16,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:16,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-13 05:06:16,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627261479] [2020-10-13 05:06:16,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:16,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 05:06:16,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775229925] [2020-10-13 05:06:16,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 05:06:16,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 05:06:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:06:16,091 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2020-10-13 05:06:16,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:16,927 INFO L93 Difference]: Finished difference Result 246 states and 287 transitions. [2020-10-13 05:06:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:06:16,928 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 85 [2020-10-13 05:06:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:16,930 INFO L225 Difference]: With dead ends: 246 [2020-10-13 05:06:16,930 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 05:06:16,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:06:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 05:06:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 91. [2020-10-13 05:06:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 05:06:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-13 05:06:16,936 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-13 05:06:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:16,937 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-13 05:06:16,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 05:06:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-13 05:06:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 05:06:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:16,938 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:16,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 05:06:16,938 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:16,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1977373850, now seen corresponding path program 51 times [2020-10-13 05:06:16,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:16,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875516068] [2020-10-13 05:06:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:16,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:20,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:21,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:06:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:22,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:22,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:22,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-13 05:06:22,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875516068] [2020-10-13 05:06:22,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:22,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:06:22,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676912626] [2020-10-13 05:06:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:06:22,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:06:22,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:06:22,890 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states.