/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:08:54,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:08:54,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:08:54,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:08:54,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:08:54,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:08:54,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:08:54,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:08:54,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:08:54,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:08:54,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:08:54,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:08:54,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:08:54,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:08:54,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:08:54,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:08:54,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:08:54,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:08:54,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:08:54,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:08:54,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:08:54,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:08:54,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:08:54,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:08:54,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:08:54,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:08:54,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:08:55,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:08:55,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:08:55,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:08:55,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:08:55,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:08:55,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:08:55,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:08:55,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:08:55,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:08:55,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:08:55,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:08:55,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:08:55,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:08:55,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:08:55,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 00:08:55,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:08:55,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:08:55,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:08:55,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:08:55,053 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:08:55,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:08:55,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:08:55,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:08:55,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:08:55,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:08:55,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:08:55,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:08:55,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:08:55,056 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:08:55,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:08:55,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:08:55,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:08:55,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:08:55,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:08:55,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:08:55,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:08:55,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:08:55,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:08:55,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:08:55,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:08:55,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:08:55,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:08:55,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:08:55,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:08:55,369 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:08:55,370 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-15 00:08:55,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dfdebfaa/e3eb2e2c215242069519d77cd930a4ac/FLAGa0a856e5b [2020-10-15 00:08:55,880 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:08:55,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-simple/deep-nested.c [2020-10-15 00:08:55,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dfdebfaa/e3eb2e2c215242069519d77cd930a4ac/FLAGa0a856e5b [2020-10-15 00:08:56,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dfdebfaa/e3eb2e2c215242069519d77cd930a4ac [2020-10-15 00:08:56,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:08:56,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:08:56,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:08:56,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:08:56,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:08:56,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a098cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56, skipping insertion in model container [2020-10-15 00:08:56,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:08:56,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:08:56,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:08:56,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:08:56,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:08:56,516 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:08:56,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56 WrapperNode [2020-10-15 00:08:56,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:08:56,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:08:56,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:08:56,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:08:56,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... [2020-10-15 00:08:56,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:08:56,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:08:56,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:08:56,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:08:56,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:08:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:08:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:08:56,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:08:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:08:56,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:08:56,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:08:56,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:08:56,899 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:08:56,899 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-15 00:08:56,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:56 BoogieIcfgContainer [2020-10-15 00:08:56,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:08:56,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:08:56,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:08:56,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:08:56,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:56" (1/3) ... [2020-10-15 00:08:56,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66047d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:56, skipping insertion in model container [2020-10-15 00:08:56,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:56" (2/3) ... [2020-10-15 00:08:56,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66047d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:56, skipping insertion in model container [2020-10-15 00:08:56,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:56" (3/3) ... [2020-10-15 00:08:56,912 INFO L109 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2020-10-15 00:08:56,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:08:56,929 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:08:56,943 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:08:56,966 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:08:56,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:08:56,966 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:08:56,966 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:08:56,966 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:08:56,967 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:08:56,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:08:56,967 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:08:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-15 00:08:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 00:08:56,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:56,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:56,989 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1946324144, now seen corresponding path program 1 times [2020-10-15 00:08:57,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:57,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900724545] [2020-10-15 00:08:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:57,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:57,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:57,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:08:57,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:57,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-15 00:08:57,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:57,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:08:57,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:57,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 00:08:57,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:08:57,593 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-10-15 00:08:57,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:57,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:57,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:57,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:57,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:57,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:08:57,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:57,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:57,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:57,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:57,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:08:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:57,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900724545] [2020-10-15 00:08:57,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:08:57,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:08:57,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657035847] [2020-10-15 00:08:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:08:57,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:08:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:08:57,661 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-15 00:08:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:57,798 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2020-10-15 00:08:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:08:57,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-15 00:08:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:57,811 INFO L225 Difference]: With dead ends: 55 [2020-10-15 00:08:57,811 INFO L226 Difference]: Without dead ends: 29 [2020-10-15 00:08:57,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:08:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-15 00:08:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-15 00:08:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-15 00:08:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-10-15 00:08:57,855 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2020-10-15 00:08:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:57,856 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-10-15 00:08:57,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:08:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-10-15 00:08:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:08:57,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:57,858 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:57,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:08:57,859 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 641398635, now seen corresponding path program 1 times [2020-10-15 00:08:57,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:57,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535542197] [2020-10-15 00:08:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:58,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:08:58,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:08:58,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 597 [2020-10-15 00:08:58,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:58,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:08:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:08:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:08:58,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:58,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:58,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:58,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:58,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:08:58,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:58,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:58,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:58,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 00:08:58,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535542197] [2020-10-15 00:08:58,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:08:58,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 00:08:58,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303899601] [2020-10-15 00:08:58,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:08:58,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:08:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:08:58,557 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 4 states. [2020-10-15 00:08:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:58,682 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-15 00:08:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:08:58,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-15 00:08:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:58,685 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:08:58,685 INFO L226 Difference]: Without dead ends: 42 [2020-10-15 00:08:58,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:08:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-15 00:08:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-15 00:08:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:08:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-15 00:08:58,698 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 15 [2020-10-15 00:08:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:58,698 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-15 00:08:58,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:08:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-15 00:08:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:08:58,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:58,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:58,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:08:58,700 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1708937016, now seen corresponding path program 1 times [2020-10-15 00:08:58,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:58,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150074376] [2020-10-15 00:08:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:58,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:58,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:59,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:08:59,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 00:08:59,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-15 00:08:59,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:59,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:08:59,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:08:59,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:08:59,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:59,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:59,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:59,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:59,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:08:59,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:59,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:59,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:59,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:59,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:59,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:08:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 00:08:59,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150074376] [2020-10-15 00:08:59,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:59,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:08:59,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187587234] [2020-10-15 00:08:59,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:08:59,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:59,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:08:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:08:59,744 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 4 states. [2020-10-15 00:08:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:59,922 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-10-15 00:08:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:08:59,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-15 00:08:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:59,924 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:08:59,924 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:08:59,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:08:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:08:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2020-10-15 00:08:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:08:59,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2020-10-15 00:08:59,951 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 18 [2020-10-15 00:08:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:59,951 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2020-10-15 00:08:59,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:08:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2020-10-15 00:08:59,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:08:59,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:59,954 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:59,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:08:59,955 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1006740478, now seen corresponding path program 1 times [2020-10-15 00:08:59,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:59,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353441791] [2020-10-15 00:08:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:02,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:04,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:04,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:09:04,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-15 00:09:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:09:04,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:04,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:04,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:09:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:09:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:05,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:05,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:05,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:05,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:05,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:05,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:05,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:09:05,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353441791] [2020-10-15 00:09:05,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:05,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:09:05,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223192600] [2020-10-15 00:09:05,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:09:05,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:05,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:09:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:09:05,066 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand 4 states. [2020-10-15 00:09:05,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:05,198 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-10-15 00:09:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:09:05,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-15 00:09:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:05,200 INFO L225 Difference]: With dead ends: 102 [2020-10-15 00:09:05,201 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:09:05,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:09:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:09:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2020-10-15 00:09:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-15 00:09:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-10-15 00:09:05,224 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 24 [2020-10-15 00:09:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:05,225 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-10-15 00:09:05,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:09:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-10-15 00:09:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:09:05,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:05,227 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:05,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:09:05,227 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1275942349, now seen corresponding path program 1 times [2020-10-15 00:09:05,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:05,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206150198] [2020-10-15 00:09:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:07,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:10,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:09:10,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-15 00:09:10,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 00:09:10,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:10,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:09:10,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:10,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:10,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:10,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:10,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:09:10,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206150198] [2020-10-15 00:09:10,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:10,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:09:10,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099281631] [2020-10-15 00:09:10,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:09:10,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:09:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:09:10,370 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 5 states. [2020-10-15 00:09:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:10,471 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2020-10-15 00:09:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:09:10,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-15 00:09:10,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:10,473 INFO L225 Difference]: With dead ends: 129 [2020-10-15 00:09:10,473 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:09:10,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:09:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2020-10-15 00:09:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:09:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-10-15 00:09:10,488 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 33 [2020-10-15 00:09:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:10,488 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-10-15 00:09:10,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:09:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-10-15 00:09:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 00:09:10,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:10,490 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:10,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:09:10,491 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 325317534, now seen corresponding path program 2 times [2020-10-15 00:09:10,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:10,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578279629] [2020-10-15 00:09:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:11,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:14,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:15,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:09:15,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:09:15,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 00:09:15,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:15,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:15,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:15,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:15,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:09:15,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:15,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:15,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:15,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:15,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:15,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:15,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-15 00:09:15,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578279629] [2020-10-15 00:09:15,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:15,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:09:15,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617037172] [2020-10-15 00:09:15,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:15,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:15,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:15,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:15,710 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 6 states. [2020-10-15 00:09:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:15,846 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2020-10-15 00:09:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:09:15,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-15 00:09:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:15,848 INFO L225 Difference]: With dead ends: 169 [2020-10-15 00:09:15,848 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 00:09:15,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 00:09:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-10-15 00:09:15,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:09:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-10-15 00:09:15,865 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 42 [2020-10-15 00:09:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:15,865 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-10-15 00:09:15,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-10-15 00:09:15,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 00:09:15,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:15,867 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:15,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:09:15,867 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1183282029, now seen corresponding path program 3 times [2020-10-15 00:09:15,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:15,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715494034] [2020-10-15 00:09:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:17,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:17,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:20,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-15 00:09:20,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 00:09:20,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 00:09:20,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:20,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:20,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:09:20,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:09:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:21,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:21,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:21,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:21,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:21,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:21,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-15 00:09:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-15 00:09:21,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715494034] [2020-10-15 00:09:21,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:21,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:09:21,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985457853] [2020-10-15 00:09:21,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:09:21,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:21,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:09:21,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:09:21,042 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 5 states. [2020-10-15 00:09:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:21,168 INFO L93 Difference]: Finished difference Result 268 states and 339 transitions. [2020-10-15 00:09:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:09:21,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-15 00:09:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:21,170 INFO L225 Difference]: With dead ends: 268 [2020-10-15 00:09:21,170 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 00:09:21,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 00:09:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 145. [2020-10-15 00:09:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 00:09:21,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2020-10-15 00:09:21,211 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 51 [2020-10-15 00:09:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2020-10-15 00:09:21,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:09:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2020-10-15 00:09:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 00:09:21,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:21,222 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:21,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:09:21,222 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash 119785171, now seen corresponding path program 4 times [2020-10-15 00:09:21,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:21,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171693655] [2020-10-15 00:09:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:25,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:26,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 00:09:26,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 00:09:26,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:09:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:26,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:26,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:26,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:26,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:26,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:09:26,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:26,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:26,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 225 proven. 38 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-15 00:09:26,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171693655] [2020-10-15 00:09:26,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:26,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:09:26,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322058111] [2020-10-15 00:09:26,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:09:26,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:26,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:09:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:09:26,423 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand 6 states. [2020-10-15 00:09:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:26,631 INFO L93 Difference]: Finished difference Result 376 states and 471 transitions. [2020-10-15 00:09:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:09:26,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-15 00:09:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:26,634 INFO L225 Difference]: With dead ends: 376 [2020-10-15 00:09:26,634 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 00:09:26,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:26,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 00:09:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 199. [2020-10-15 00:09:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-15 00:09:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2020-10-15 00:09:26,674 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 75 [2020-10-15 00:09:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:26,675 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2020-10-15 00:09:26,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:09:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2020-10-15 00:09:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-15 00:09:26,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:26,678 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:26,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:09:26,678 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:26,679 INFO L82 PathProgramCache]: Analyzing trace with hash -682936557, now seen corresponding path program 5 times [2020-10-15 00:09:26,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:26,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868423355] [2020-10-15 00:09:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:26,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:28,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:31,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-15 00:09:31,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 00:09:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:31,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:31,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:31,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:31,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:31,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:31,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:31,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:31,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:31,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 444 proven. 111 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2020-10-15 00:09:31,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868423355] [2020-10-15 00:09:31,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:31,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:09:31,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546861346] [2020-10-15 00:09:31,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:31,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:31,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:31,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:31,960 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand 7 states. [2020-10-15 00:09:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:32,151 INFO L93 Difference]: Finished difference Result 484 states and 603 transitions. [2020-10-15 00:09:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:09:32,152 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-15 00:09:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:32,154 INFO L225 Difference]: With dead ends: 484 [2020-10-15 00:09:32,154 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 00:09:32,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 00:09:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 253. [2020-10-15 00:09:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-15 00:09:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 312 transitions. [2020-10-15 00:09:32,186 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 312 transitions. Word has length 99 [2020-10-15 00:09:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:32,187 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 312 transitions. [2020-10-15 00:09:32,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 312 transitions. [2020-10-15 00:09:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-15 00:09:32,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:32,189 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:32,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:09:32,189 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1298914643, now seen corresponding path program 6 times [2020-10-15 00:09:32,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:32,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877494206] [2020-10-15 00:09:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:32,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:37,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:09:37,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:37,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:37,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:37,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:37,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:37,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:37,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 716 proven. 20 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-15 00:09:37,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877494206] [2020-10-15 00:09:37,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:37,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:09:37,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691259600] [2020-10-15 00:09:37,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:09:37,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:09:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:09:37,462 INFO L87 Difference]: Start difference. First operand 253 states and 312 transitions. Second operand 7 states. [2020-10-15 00:09:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:37,633 INFO L93 Difference]: Finished difference Result 614 states and 771 transitions. [2020-10-15 00:09:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:09:37,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-15 00:09:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:37,637 INFO L225 Difference]: With dead ends: 614 [2020-10-15 00:09:37,637 INFO L226 Difference]: Without dead ends: 367 [2020-10-15 00:09:37,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-15 00:09:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 318. [2020-10-15 00:09:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-15 00:09:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 390 transitions. [2020-10-15 00:09:37,682 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 390 transitions. Word has length 123 [2020-10-15 00:09:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:37,682 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 390 transitions. [2020-10-15 00:09:37,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:09:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 390 transitions. [2020-10-15 00:09:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-15 00:09:37,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:37,684 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:37,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:09:37,684 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2115916110, now seen corresponding path program 7 times [2020-10-15 00:09:37,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:37,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487335491] [2020-10-15 00:09:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:42,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:09:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:42,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:09:42,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:42,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:42,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:42,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:42,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:42,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:42,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:42,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1177 proven. 32 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2020-10-15 00:09:43,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487335491] [2020-10-15 00:09:43,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:43,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:09:43,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053854639] [2020-10-15 00:09:43,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:09:43,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:09:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:43,054 INFO L87 Difference]: Start difference. First operand 318 states and 390 transitions. Second operand 8 states. [2020-10-15 00:09:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:43,348 INFO L93 Difference]: Finished difference Result 744 states and 927 transitions. [2020-10-15 00:09:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:09:43,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2020-10-15 00:09:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:43,353 INFO L225 Difference]: With dead ends: 744 [2020-10-15 00:09:43,354 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 00:09:43,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 00:09:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2020-10-15 00:09:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-15 00:09:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 468 transitions. [2020-10-15 00:09:43,424 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 468 transitions. Word has length 150 [2020-10-15 00:09:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:43,424 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 468 transitions. [2020-10-15 00:09:43,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:09:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 468 transitions. [2020-10-15 00:09:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-15 00:09:43,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:43,434 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:43,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:09:43,435 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:43,435 INFO L82 PathProgramCache]: Analyzing trace with hash 24300019, now seen corresponding path program 8 times [2020-10-15 00:09:43,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:43,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223485101] [2020-10-15 00:09:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:43,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:46,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-15 00:09:48,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 00:09:48,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:09:48,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:48,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:48,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:48,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:48,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:48,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:48,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:48,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:48,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:48,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:48,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3533 backedges. 1319 proven. 41 refuted. 0 times theorem prover too weak. 2173 trivial. 0 not checked. [2020-10-15 00:09:48,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223485101] [2020-10-15 00:09:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:48,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:09:48,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668170964] [2020-10-15 00:09:48,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:09:48,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:09:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:09:48,899 INFO L87 Difference]: Start difference. First operand 383 states and 468 transitions. Second operand 9 states. [2020-10-15 00:09:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:49,193 INFO L93 Difference]: Finished difference Result 874 states and 1083 transitions. [2020-10-15 00:09:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:09:49,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 177 [2020-10-15 00:09:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:49,198 INFO L225 Difference]: With dead ends: 874 [2020-10-15 00:09:49,199 INFO L226 Difference]: Without dead ends: 497 [2020-10-15 00:09:49,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:09:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-15 00:09:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 448. [2020-10-15 00:09:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-15 00:09:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 546 transitions. [2020-10-15 00:09:49,275 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 546 transitions. Word has length 177 [2020-10-15 00:09:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:49,276 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 546 transitions. [2020-10-15 00:09:49,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:09:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 546 transitions. [2020-10-15 00:09:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-15 00:09:49,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:49,282 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:49,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:09:49,282 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash -762218990, now seen corresponding path program 9 times [2020-10-15 00:09:49,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:49,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140615402] [2020-10-15 00:09:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:49,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:49,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:51,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:54,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-15 00:09:54,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:09:54,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:09:54,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:54,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:54,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:54,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:09:54,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:54,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:09:54,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:54,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:54,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:54,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:54,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:54,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4946 backedges. 1845 proven. 58 refuted. 0 times theorem prover too weak. 3043 trivial. 0 not checked. [2020-10-15 00:09:54,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140615402] [2020-10-15 00:09:54,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:54,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:09:54,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508986025] [2020-10-15 00:09:54,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:09:54,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:09:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:09:54,807 INFO L87 Difference]: Start difference. First operand 448 states and 546 transitions. Second operand 10 states. [2020-10-15 00:09:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:55,195 INFO L93 Difference]: Finished difference Result 1004 states and 1239 transitions. [2020-10-15 00:09:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:09:55,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 204 [2020-10-15 00:09:55,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:55,200 INFO L225 Difference]: With dead ends: 1004 [2020-10-15 00:09:55,200 INFO L226 Difference]: Without dead ends: 562 [2020-10-15 00:09:55,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:09:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-10-15 00:09:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 513. [2020-10-15 00:09:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-15 00:09:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 624 transitions. [2020-10-15 00:09:55,265 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 624 transitions. Word has length 204 [2020-10-15 00:09:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:55,265 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 624 transitions. [2020-10-15 00:09:55,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:09:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 624 transitions. [2020-10-15 00:09:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-15 00:09:55,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:55,269 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:55,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:09:55,269 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash 445906579, now seen corresponding path program 10 times [2020-10-15 00:09:55,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:55,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595829868] [2020-10-15 00:09:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:55,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:55,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:55,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:57,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:00,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:10:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:00,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:10:00,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:00,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:00,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:00,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:00,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:00,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6602 backedges. 2461 proven. 78 refuted. 0 times theorem prover too weak. 4063 trivial. 0 not checked. [2020-10-15 00:10:00,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595829868] [2020-10-15 00:10:00,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:00,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:10:00,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528356799] [2020-10-15 00:10:00,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:10:00,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:10:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:10:00,826 INFO L87 Difference]: Start difference. First operand 513 states and 624 transitions. Second operand 11 states. [2020-10-15 00:10:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:01,239 INFO L93 Difference]: Finished difference Result 1134 states and 1395 transitions. [2020-10-15 00:10:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:10:01,239 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 231 [2020-10-15 00:10:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:01,243 INFO L225 Difference]: With dead ends: 1134 [2020-10-15 00:10:01,243 INFO L226 Difference]: Without dead ends: 627 [2020-10-15 00:10:01,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:10:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-10-15 00:10:01,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 578. [2020-10-15 00:10:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-15 00:10:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 702 transitions. [2020-10-15 00:10:01,310 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 702 transitions. Word has length 231 [2020-10-15 00:10:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:01,310 INFO L479 AbstractCegarLoop]: Abstraction has 578 states and 702 transitions. [2020-10-15 00:10:01,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:10:01,310 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 702 transitions. [2020-10-15 00:10:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-15 00:10:01,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:01,315 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 72, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:01,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:10:01,315 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:01,316 INFO L82 PathProgramCache]: Analyzing trace with hash 61207922, now seen corresponding path program 11 times [2020-10-15 00:10:01,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:01,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513539608] [2020-10-15 00:10:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:01,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:03,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:06,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:06,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 264 [2020-10-15 00:10:06,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-15 00:10:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-15 00:10:06,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:06,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:10:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:06,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 00:10:06,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:06,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:06,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:06,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8501 backedges. 2967 proven. 301 refuted. 0 times theorem prover too weak. 5233 trivial. 0 not checked. [2020-10-15 00:10:06,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513539608] [2020-10-15 00:10:06,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:06,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:10:06,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639011438] [2020-10-15 00:10:06,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:10:06,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:10:06,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:10:06,849 INFO L87 Difference]: Start difference. First operand 578 states and 702 transitions. Second operand 12 states. [2020-10-15 00:10:07,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:07,564 INFO L93 Difference]: Finished difference Result 1264 states and 1551 transitions. [2020-10-15 00:10:07,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:10:07,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 258 [2020-10-15 00:10:07,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:07,569 INFO L225 Difference]: With dead ends: 1264 [2020-10-15 00:10:07,569 INFO L226 Difference]: Without dead ends: 692 [2020-10-15 00:10:07,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:10:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-15 00:10:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 643. [2020-10-15 00:10:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-10-15 00:10:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 780 transitions. [2020-10-15 00:10:07,637 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 780 transitions. Word has length 258 [2020-10-15 00:10:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:07,638 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 780 transitions. [2020-10-15 00:10:07,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:10:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 780 transitions. [2020-10-15 00:10:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-15 00:10:07,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:07,642 INFO L422 BasicCegarLoop]: trace histogram [82, 81, 81, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:07,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:10:07,643 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash 805927731, now seen corresponding path program 12 times [2020-10-15 00:10:07,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:07,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995668238] [2020-10-15 00:10:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:09,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:12,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:12,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:10:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:13,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:13,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:13,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:13,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:13,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:13,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:13,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:13,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:13,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10643 backedges. 2116 proven. 117 refuted. 0 times theorem prover too weak. 8410 trivial. 0 not checked. [2020-10-15 00:10:13,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995668238] [2020-10-15 00:10:13,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:13,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:10:13,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876716777] [2020-10-15 00:10:13,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:10:13,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:10:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:10:13,385 INFO L87 Difference]: Start difference. First operand 643 states and 780 transitions. Second operand 13 states. [2020-10-15 00:10:13,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:13,954 INFO L93 Difference]: Finished difference Result 1394 states and 1707 transitions. [2020-10-15 00:10:13,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:10:13,954 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 285 [2020-10-15 00:10:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:13,958 INFO L225 Difference]: With dead ends: 1394 [2020-10-15 00:10:13,959 INFO L226 Difference]: Without dead ends: 757 [2020-10-15 00:10:13,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:10:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-15 00:10:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 708. [2020-10-15 00:10:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-10-15 00:10:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 858 transitions. [2020-10-15 00:10:14,040 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 858 transitions. Word has length 285 [2020-10-15 00:10:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:14,040 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 858 transitions. [2020-10-15 00:10:14,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:10:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 858 transitions. [2020-10-15 00:10:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-15 00:10:14,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:14,054 INFO L422 BasicCegarLoop]: trace histogram [91, 90, 90, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:14,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:10:14,054 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 480586962, now seen corresponding path program 13 times [2020-10-15 00:10:14,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:14,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040874509] [2020-10-15 00:10:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:15,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:18,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:19,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-15 00:10:19,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:19,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:19,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:19,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:19,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:19,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:19,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:19,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:19,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:19,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:19,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:19,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13028 backedges. 4849 proven. 156 refuted. 0 times theorem prover too weak. 8023 trivial. 0 not checked. [2020-10-15 00:10:20,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040874509] [2020-10-15 00:10:20,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:20,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:10:20,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032754130] [2020-10-15 00:10:20,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:10:20,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:10:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:10:20,132 INFO L87 Difference]: Start difference. First operand 708 states and 858 transitions. Second operand 14 states. [2020-10-15 00:10:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:20,828 INFO L93 Difference]: Finished difference Result 1524 states and 1863 transitions. [2020-10-15 00:10:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:10:20,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 312 [2020-10-15 00:10:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:20,834 INFO L225 Difference]: With dead ends: 1524 [2020-10-15 00:10:20,834 INFO L226 Difference]: Without dead ends: 822 [2020-10-15 00:10:20,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2020-10-15 00:10:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 773. [2020-10-15 00:10:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 773 states. [2020-10-15 00:10:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 936 transitions. [2020-10-15 00:10:20,935 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 936 transitions. Word has length 312 [2020-10-15 00:10:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:20,936 INFO L479 AbstractCegarLoop]: Abstraction has 773 states and 936 transitions. [2020-10-15 00:10:20,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:10:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 936 transitions. [2020-10-15 00:10:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-15 00:10:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:20,943 INFO L422 BasicCegarLoop]: trace histogram [100, 99, 99, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:20,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:10:20,944 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash -645054509, now seen corresponding path program 14 times [2020-10-15 00:10:20,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:20,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607487489] [2020-10-15 00:10:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:21,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:24,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:25,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:26,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 00:10:26,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:26,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:26,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:26,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:26,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:26,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:26,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:26,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:26,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15656 backedges. 3110 proven. 176 refuted. 0 times theorem prover too weak. 12370 trivial. 0 not checked. [2020-10-15 00:10:27,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607487489] [2020-10-15 00:10:27,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:27,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:10:27,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80278186] [2020-10-15 00:10:27,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:10:27,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:10:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:10:27,181 INFO L87 Difference]: Start difference. First operand 773 states and 936 transitions. Second operand 15 states. [2020-10-15 00:10:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:28,015 INFO L93 Difference]: Finished difference Result 1654 states and 2019 transitions. [2020-10-15 00:10:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:10:28,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 339 [2020-10-15 00:10:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:28,021 INFO L225 Difference]: With dead ends: 1654 [2020-10-15 00:10:28,021 INFO L226 Difference]: Without dead ends: 887 [2020-10-15 00:10:28,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2020-10-15 00:10:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 838. [2020-10-15 00:10:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-10-15 00:10:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1014 transitions. [2020-10-15 00:10:28,148 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1014 transitions. Word has length 339 [2020-10-15 00:10:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:28,149 INFO L479 AbstractCegarLoop]: Abstraction has 838 states and 1014 transitions. [2020-10-15 00:10:28,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:10:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1014 transitions. [2020-10-15 00:10:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-15 00:10:28,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:28,155 INFO L422 BasicCegarLoop]: trace histogram [109, 108, 108, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:28,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:10:28,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:28,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash -728425422, now seen corresponding path program 15 times [2020-10-15 00:10:28,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:28,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820045807] [2020-10-15 00:10:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:29,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:29,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:33,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 372 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 00:10:33,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:34,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:34,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:34,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:34,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:34,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:34,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:34,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:34,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:34,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18527 backedges. 3679 proven. 210 refuted. 0 times theorem prover too weak. 14638 trivial. 0 not checked. [2020-10-15 00:10:34,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820045807] [2020-10-15 00:10:34,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:34,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:10:34,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24043958] [2020-10-15 00:10:34,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:10:34,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:34,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:10:34,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:10:34,510 INFO L87 Difference]: Start difference. First operand 838 states and 1014 transitions. Second operand 16 states. [2020-10-15 00:10:35,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:35,464 INFO L93 Difference]: Finished difference Result 1784 states and 2175 transitions. [2020-10-15 00:10:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:10:35,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 366 [2020-10-15 00:10:35,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:35,469 INFO L225 Difference]: With dead ends: 1784 [2020-10-15 00:10:35,470 INFO L226 Difference]: Without dead ends: 952 [2020-10-15 00:10:35,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:10:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-10-15 00:10:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 903. [2020-10-15 00:10:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2020-10-15 00:10:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1092 transitions. [2020-10-15 00:10:35,562 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1092 transitions. Word has length 366 [2020-10-15 00:10:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:35,562 INFO L479 AbstractCegarLoop]: Abstraction has 903 states and 1092 transitions. [2020-10-15 00:10:35,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:10:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1092 transitions. [2020-10-15 00:10:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-15 00:10:35,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:35,567 INFO L422 BasicCegarLoop]: trace histogram [118, 117, 117, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:35,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:10:35,567 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1331252339, now seen corresponding path program 16 times [2020-10-15 00:10:35,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:35,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131867320] [2020-10-15 00:10:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:36,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:38,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:39,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:40,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:10:40,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:40,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-15 00:10:40,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:41,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:41,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:41,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:41,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:41,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:41,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:41,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:41,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21641 backedges. 4296 proven. 247 refuted. 0 times theorem prover too weak. 17098 trivial. 0 not checked. [2020-10-15 00:10:41,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131867320] [2020-10-15 00:10:41,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:41,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:10:41,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662188612] [2020-10-15 00:10:41,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:10:41,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:41,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:10:41,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:10:41,486 INFO L87 Difference]: Start difference. First operand 903 states and 1092 transitions. Second operand 17 states. [2020-10-15 00:10:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:42,945 INFO L93 Difference]: Finished difference Result 1914 states and 2331 transitions. [2020-10-15 00:10:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:10:42,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-10-15 00:10:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:42,953 INFO L225 Difference]: With dead ends: 1914 [2020-10-15 00:10:42,953 INFO L226 Difference]: Without dead ends: 1017 [2020-10-15 00:10:42,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:10:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2020-10-15 00:10:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 968. [2020-10-15 00:10:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-10-15 00:10:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1170 transitions. [2020-10-15 00:10:43,040 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1170 transitions. Word has length 393 [2020-10-15 00:10:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:43,041 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1170 transitions. [2020-10-15 00:10:43,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:10:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1170 transitions. [2020-10-15 00:10:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-10-15 00:10:43,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:43,045 INFO L422 BasicCegarLoop]: trace histogram [127, 126, 126, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:43,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:10:43,045 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash -235158638, now seen corresponding path program 17 times [2020-10-15 00:10:43,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:43,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76502511] [2020-10-15 00:10:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:44,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:45,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:46,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:47,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:48,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:48,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:10:48,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:48,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:48,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:48,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:48,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24998 backedges. 4961 proven. 287 refuted. 0 times theorem prover too weak. 19750 trivial. 0 not checked. [2020-10-15 00:10:49,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76502511] [2020-10-15 00:10:49,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:49,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:10:49,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058638247] [2020-10-15 00:10:49,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:10:49,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:49,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:10:49,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:10:49,076 INFO L87 Difference]: Start difference. First operand 968 states and 1170 transitions. Second operand 18 states. [2020-10-15 00:10:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:50,722 INFO L93 Difference]: Finished difference Result 2044 states and 2487 transitions. [2020-10-15 00:10:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:10:50,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 420 [2020-10-15 00:10:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:50,728 INFO L225 Difference]: With dead ends: 2044 [2020-10-15 00:10:50,728 INFO L226 Difference]: Without dead ends: 1082 [2020-10-15 00:10:50,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:10:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-10-15 00:10:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1033. [2020-10-15 00:10:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2020-10-15 00:10:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1248 transitions. [2020-10-15 00:10:50,840 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1248 transitions. Word has length 420 [2020-10-15 00:10:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:50,840 INFO L479 AbstractCegarLoop]: Abstraction has 1033 states and 1248 transitions. [2020-10-15 00:10:50,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:10:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1248 transitions. [2020-10-15 00:10:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-15 00:10:50,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:50,845 INFO L422 BasicCegarLoop]: trace histogram [136, 135, 135, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:50,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:10:50,845 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:50,846 INFO L82 PathProgramCache]: Analyzing trace with hash 170369299, now seen corresponding path program 18 times [2020-10-15 00:10:50,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:50,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561180319] [2020-10-15 00:10:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:51,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:52,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:53,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:55,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:10:56,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 00:10:56,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:56,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:56,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:56,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:10:56,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:56,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28598 backedges. 5674 proven. 330 refuted. 0 times theorem prover too weak. 22594 trivial. 0 not checked. [2020-10-15 00:10:56,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561180319] [2020-10-15 00:10:56,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:56,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:10:56,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337341222] [2020-10-15 00:10:56,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:10:56,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:56,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:10:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:10:56,903 INFO L87 Difference]: Start difference. First operand 1033 states and 1248 transitions. Second operand 19 states. [2020-10-15 00:10:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:58,928 INFO L93 Difference]: Finished difference Result 2174 states and 2643 transitions. [2020-10-15 00:10:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:10:58,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 447 [2020-10-15 00:10:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:58,935 INFO L225 Difference]: With dead ends: 2174 [2020-10-15 00:10:58,935 INFO L226 Difference]: Without dead ends: 1147 [2020-10-15 00:10:58,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:10:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-10-15 00:10:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1098. [2020-10-15 00:10:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-10-15 00:10:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1326 transitions. [2020-10-15 00:10:59,048 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1326 transitions. Word has length 447 [2020-10-15 00:10:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:59,048 INFO L479 AbstractCegarLoop]: Abstraction has 1098 states and 1326 transitions. [2020-10-15 00:10:59,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:10:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1326 transitions. [2020-10-15 00:10:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-10-15 00:10:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:59,053 INFO L422 BasicCegarLoop]: trace histogram [145, 144, 144, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:59,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:10:59,054 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1428217102, now seen corresponding path program 19 times [2020-10-15 00:10:59,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:59,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733531183] [2020-10-15 00:10:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:59,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:02,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:03,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:04,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 480 [2020-10-15 00:11:04,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-15 00:11:04,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:11:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:04,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:04,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:05,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:05,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32441 backedges. 6435 proven. 376 refuted. 0 times theorem prover too weak. 25630 trivial. 0 not checked. [2020-10-15 00:11:05,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733531183] [2020-10-15 00:11:05,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:05,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:11:05,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782199884] [2020-10-15 00:11:05,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:11:05,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:05,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:11:05,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:11:05,148 INFO L87 Difference]: Start difference. First operand 1098 states and 1326 transitions. Second operand 20 states. [2020-10-15 00:11:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:07,175 INFO L93 Difference]: Finished difference Result 2304 states and 2799 transitions. [2020-10-15 00:11:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:11:07,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 474 [2020-10-15 00:11:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:07,182 INFO L225 Difference]: With dead ends: 2304 [2020-10-15 00:11:07,183 INFO L226 Difference]: Without dead ends: 1212 [2020-10-15 00:11:07,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:11:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-10-15 00:11:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1163. [2020-10-15 00:11:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1163 states. [2020-10-15 00:11:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1404 transitions. [2020-10-15 00:11:07,310 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1404 transitions. Word has length 474 [2020-10-15 00:11:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:07,310 INFO L479 AbstractCegarLoop]: Abstraction has 1163 states and 1404 transitions. [2020-10-15 00:11:07,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:11:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1404 transitions. [2020-10-15 00:11:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-10-15 00:11:07,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:07,318 INFO L422 BasicCegarLoop]: trace histogram [154, 153, 153, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:07,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:11:07,318 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:07,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1664236979, now seen corresponding path program 20 times [2020-10-15 00:11:07,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:07,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594177932] [2020-10-15 00:11:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:09,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:09,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:10,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:11,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:11,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:12,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 507 [2020-10-15 00:11:12,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-15 00:11:12,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:11:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:12,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:12,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:12,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:12,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 36527 backedges. 1696 proven. 0 refuted. 0 times theorem prover too weak. 34831 trivial. 0 not checked. [2020-10-15 00:11:12,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594177932] [2020-10-15 00:11:12,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:11:12,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:11:12,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291691676] [2020-10-15 00:11:12,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:11:12,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:12,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:11:12,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:11:12,988 INFO L87 Difference]: Start difference. First operand 1163 states and 1404 transitions. Second operand 3 states. [2020-10-15 00:11:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:13,139 INFO L93 Difference]: Finished difference Result 2988 states and 3692 transitions. [2020-10-15 00:11:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:11:13,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-10-15 00:11:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:13,148 INFO L225 Difference]: With dead ends: 2988 [2020-10-15 00:11:13,148 INFO L226 Difference]: Without dead ends: 1831 [2020-10-15 00:11:13,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:11:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2020-10-15 00:11:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1385. [2020-10-15 00:11:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-10-15 00:11:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1626 transitions. [2020-10-15 00:11:13,339 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1626 transitions. Word has length 501 [2020-10-15 00:11:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:13,339 INFO L479 AbstractCegarLoop]: Abstraction has 1385 states and 1626 transitions. [2020-10-15 00:11:13,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:11:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1626 transitions. [2020-10-15 00:11:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 961 [2020-10-15 00:11:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:13,350 INFO L422 BasicCegarLoop]: trace histogram [154, 154, 153, 153, 153, 153, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:13,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:11:13,351 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1882371845, now seen corresponding path program 1 times [2020-10-15 00:11:13,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:13,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354820714] [2020-10-15 00:11:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:20,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:21,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 966 [2020-10-15 00:11:21,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:11:21,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6575 [2020-10-15 00:11:21,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:21,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:11:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:11:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:11:21,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:21,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:21,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 95126 backedges. 2305 proven. 3 refuted. 0 times theorem prover too weak. 92818 trivial. 0 not checked. [2020-10-15 00:11:21,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354820714] [2020-10-15 00:11:21,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:21,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:11:21,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451596085] [2020-10-15 00:11:21,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:11:21,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:21,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:11:21,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:11:21,830 INFO L87 Difference]: Start difference. First operand 1385 states and 1626 transitions. Second operand 5 states. [2020-10-15 00:11:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:22,084 INFO L93 Difference]: Finished difference Result 3874 states and 4580 transitions. [2020-10-15 00:11:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:11:22,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 960 [2020-10-15 00:11:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:22,093 INFO L225 Difference]: With dead ends: 3874 [2020-10-15 00:11:22,093 INFO L226 Difference]: Without dead ends: 2495 [2020-10-15 00:11:22,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2020-10-15 00:11:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2052. [2020-10-15 00:11:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2052 states. [2020-10-15 00:11:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2293 transitions. [2020-10-15 00:11:22,354 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2293 transitions. Word has length 960 [2020-10-15 00:11:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:22,354 INFO L479 AbstractCegarLoop]: Abstraction has 2052 states and 2293 transitions. [2020-10-15 00:11:22,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:11:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2293 transitions. [2020-10-15 00:11:22,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1426 [2020-10-15 00:11:22,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:22,377 INFO L422 BasicCegarLoop]: trace histogram [309, 308, 308, 154, 153, 153, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:22,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:11:22,378 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:22,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1584066547, now seen corresponding path program 2 times [2020-10-15 00:11:22,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:22,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482736997] [2020-10-15 00:11:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:27,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:32,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:32,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1431 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8055 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:11:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:33,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:33,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:33,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:33,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:33,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:33,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:33,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:33,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 226101 backedges. 2775 proven. 5 refuted. 0 times theorem prover too weak. 223321 trivial. 0 not checked. [2020-10-15 00:11:34,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482736997] [2020-10-15 00:11:34,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:34,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 00:11:34,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285540014] [2020-10-15 00:11:34,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 00:11:34,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:34,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 00:11:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:11:34,037 INFO L87 Difference]: Start difference. First operand 2052 states and 2293 transitions. Second operand 6 states. [2020-10-15 00:11:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:34,448 INFO L93 Difference]: Finished difference Result 5207 states and 5912 transitions. [2020-10-15 00:11:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:11:34,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1425 [2020-10-15 00:11:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:34,460 INFO L225 Difference]: With dead ends: 5207 [2020-10-15 00:11:34,461 INFO L226 Difference]: Without dead ends: 3161 [2020-10-15 00:11:34,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:11:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2020-10-15 00:11:34,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2718. [2020-10-15 00:11:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2718 states. [2020-10-15 00:11:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 2959 transitions. [2020-10-15 00:11:34,729 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 2959 transitions. Word has length 1425 [2020-10-15 00:11:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:34,730 INFO L479 AbstractCegarLoop]: Abstraction has 2718 states and 2959 transitions. [2020-10-15 00:11:34,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 00:11:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 2959 transitions. [2020-10-15 00:11:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2020-10-15 00:11:34,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:34,769 INFO L422 BasicCegarLoop]: trace histogram [463, 462, 462, 154, 153, 153, 9, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:34,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:11:34,769 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1039755217, now seen corresponding path program 3 times [2020-10-15 00:11:34,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:34,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960407839] [2020-10-15 00:11:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:42,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:45,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:45,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1893 [2020-10-15 00:11:45,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:45,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7498 [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:11:45,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:46,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:46,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:46,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:11:46,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:46,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:46,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:46,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:46,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:46,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 427610 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 427607 trivial. 0 not checked. [2020-10-15 00:11:47,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960407839] [2020-10-15 00:11:47,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:11:47,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:11:47,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591049108] [2020-10-15 00:11:47,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:11:47,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:47,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:11:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:11:47,233 INFO L87 Difference]: Start difference. First operand 2718 states and 2959 transitions. Second operand 3 states. [2020-10-15 00:11:47,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:47,571 INFO L93 Difference]: Finished difference Result 5431 states and 5913 transitions. [2020-10-15 00:11:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:11:47,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1887 [2020-10-15 00:11:47,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:47,583 INFO L225 Difference]: With dead ends: 5431 [2020-10-15 00:11:47,583 INFO L226 Difference]: Without dead ends: 3550 [2020-10-15 00:11:47,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:11:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-10-15 00:11:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2719. [2020-10-15 00:11:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2719 states. [2020-10-15 00:11:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 2959 transitions. [2020-10-15 00:11:47,858 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 2959 transitions. Word has length 1887 [2020-10-15 00:11:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:47,859 INFO L479 AbstractCegarLoop]: Abstraction has 2719 states and 2959 transitions. [2020-10-15 00:11:47,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:11:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 2959 transitions. [2020-10-15 00:11:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2719 [2020-10-15 00:11:47,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:47,915 INFO L422 BasicCegarLoop]: trace histogram [667, 666, 666, 222, 221, 221, 13, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:47,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:11:47,915 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1091948820, now seen corresponding path program 4 times [2020-10-15 00:11:47,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:47,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968736033] [2020-10-15 00:11:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:02,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:10,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:10,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 2724 [2020-10-15 00:12:10,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:10,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15214 [2020-10-15 00:12:10,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:10,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:12:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:12:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:12:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:11,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:12:11,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:11,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:11,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:11,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:12:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 889134 backedges. 7768 proven. 12 refuted. 0 times theorem prover too weak. 881354 trivial. 0 not checked. [2020-10-15 00:12:13,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968736033] [2020-10-15 00:12:13,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:13,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 00:12:13,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204158960] [2020-10-15 00:12:13,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:12:13,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:13,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:12:13,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:12:13,762 INFO L87 Difference]: Start difference. First operand 2719 states and 2959 transitions. Second operand 7 states. [2020-10-15 00:12:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:14,137 INFO L93 Difference]: Finished difference Result 6540 states and 7243 transitions. [2020-10-15 00:12:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:12:14,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 2718 [2020-10-15 00:12:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:14,151 INFO L225 Difference]: With dead ends: 6540 [2020-10-15 00:12:14,151 INFO L226 Difference]: Without dead ends: 3828 [2020-10-15 00:12:14,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:12:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2020-10-15 00:12:14,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 3385. [2020-10-15 00:12:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3385 states. [2020-10-15 00:12:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 3625 transitions. [2020-10-15 00:12:14,490 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 3625 transitions. Word has length 2718 [2020-10-15 00:12:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:14,491 INFO L479 AbstractCegarLoop]: Abstraction has 3385 states and 3625 transitions. [2020-10-15 00:12:14,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:12:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 3625 transitions. [2020-10-15 00:12:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3385 [2020-10-15 00:12:14,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:14,555 INFO L422 BasicCegarLoop]: trace histogram [889, 888, 888, 222, 221, 221, 13, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:14,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:12:14,555 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:14,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1631723026, now seen corresponding path program 5 times [2020-10-15 00:12:14,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:14,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967271293] [2020-10-15 00:12:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:12:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:41,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:41,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 3390 [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19171 [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:12:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:12:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:12:41,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:12:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:12:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:12:42,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:12:42,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:12:42,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:12:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1455789 backedges. 12852 proven. 22 refuted. 0 times theorem prover too weak. 1442915 trivial. 0 not checked. [2020-10-15 00:12:46,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967271293] [2020-10-15 00:12:46,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:12:46,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:12:46,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015393091] [2020-10-15 00:12:46,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:12:46,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:12:46,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:12:46,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:12:46,424 INFO L87 Difference]: Start difference. First operand 3385 states and 3625 transitions. Second operand 8 states. [2020-10-15 00:12:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:12:46,993 INFO L93 Difference]: Finished difference Result 7872 states and 8575 transitions. [2020-10-15 00:12:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:12:46,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 3384 [2020-10-15 00:12:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:12:47,011 INFO L225 Difference]: With dead ends: 7872 [2020-10-15 00:12:47,011 INFO L226 Difference]: Without dead ends: 4494 [2020-10-15 00:12:47,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:12:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-10-15 00:12:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4051. [2020-10-15 00:12:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4051 states. [2020-10-15 00:12:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4051 states to 4051 states and 4291 transitions. [2020-10-15 00:12:47,354 INFO L78 Accepts]: Start accepts. Automaton has 4051 states and 4291 transitions. Word has length 3384 [2020-10-15 00:12:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:12:47,354 INFO L479 AbstractCegarLoop]: Abstraction has 4051 states and 4291 transitions. [2020-10-15 00:12:47,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:12:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4051 states and 4291 transitions. [2020-10-15 00:12:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4051 [2020-10-15 00:12:47,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:12:47,442 INFO L422 BasicCegarLoop]: trace histogram [1111, 1110, 1110, 222, 221, 221, 13, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:12:47,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:12:47,442 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:12:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:12:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -255232684, now seen corresponding path program 6 times [2020-10-15 00:12:47,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:12:47,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934165697] [2020-10-15 00:12:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY