/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:35:30,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:35:30,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:35:30,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:35:30,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:35:30,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:35:30,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:35:30,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:35:30,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:35:30,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:35:30,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:35:30,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:35:30,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:35:30,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:35:30,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:35:30,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:35:30,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:35:30,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:35:30,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:35:30,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:35:30,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:35:31,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:35:31,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:35:31,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:35:31,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:35:31,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:35:31,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:35:31,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:35:31,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:35:31,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:35:31,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:35:31,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:35:31,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:35:31,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:35:31,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:35:31,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:35:31,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:35:31,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:35:31,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:35:31,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:35:31,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:35:31,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 04:35:31,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:35:31,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:35:31,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:35:31,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:35:31,049 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:35:31,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:35:31,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:35:31,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:35:31,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:35:31,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:35:31,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:35:31,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:35:31,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:35:31,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:35:31,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:35:31,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:35:31,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:35:31,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:35:31,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:35:31,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:35:31,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:35:31,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:35:31,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:35:31,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:35:31,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:35:31,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:35:31,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:35:31,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:35:31,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:35:31,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:35:31,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:35:31,576 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:35:31,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:35:31,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:35:31,586 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:35:31,588 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-25 04:35:31,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4505be9/6a3a3f6c7066432d8cb1f44fdd9ec67c/FLAGa4d0b9e58 [2020-09-25 04:35:32,220 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:35:32,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-09-25 04:35:32,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4505be9/6a3a3f6c7066432d8cb1f44fdd9ec67c/FLAGa4d0b9e58 [2020-09-25 04:35:32,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc4505be9/6a3a3f6c7066432d8cb1f44fdd9ec67c [2020-09-25 04:35:32,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:35:32,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:35:32,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:35:32,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:35:32,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:35:32,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3116520e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32, skipping insertion in model container [2020-09-25 04:35:32,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:35:32,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:35:32,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:35:32,854 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:35:32,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:35:32,899 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:35:32,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32 WrapperNode [2020-09-25 04:35:32,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:35:32,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:35:32,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:35:32,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:35:32,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:32,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:33,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:33,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... [2020-09-25 04:35:33,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:35:33,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:35:33,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:35:33,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:35:33,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:35:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:35:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:35:33,116 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 04:35:33,117 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:35:33,117 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:35:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:35:33,117 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 04:35:33,118 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 04:35:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:35:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:35:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:35:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:35:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:35:33,457 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:35:33,457 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 04:35:33,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:33 BoogieIcfgContainer [2020-09-25 04:35:33,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:35:33,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:35:33,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:35:33,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:35:33,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:35:32" (1/3) ... [2020-09-25 04:35:33,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281345a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:33, skipping insertion in model container [2020-09-25 04:35:33,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:35:32" (2/3) ... [2020-09-25 04:35:33,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281345a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:35:33, skipping insertion in model container [2020-09-25 04:35:33,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:35:33" (3/3) ... [2020-09-25 04:35:33,473 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-09-25 04:35:33,486 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:35:33,498 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:35:33,523 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:35:33,556 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:35:33,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:35:33,557 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:35:33,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:35:33,558 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:35:33,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:35:33,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:35:33,558 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:35:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-09-25 04:35:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 04:35:33,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:33,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:33,596 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -537390573, now seen corresponding path program 1 times [2020-09-25 04:35:33,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:33,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344173638] [2020-09-25 04:35:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:33,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:33,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 04:35:33,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:33,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-25 04:35:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 04:35:33,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:33,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:35:33,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:33,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:33,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:33,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:33,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:33,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:33,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:33,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:33,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:33,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:33,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:33,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:33,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344173638] [2020-09-25 04:35:33,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:33,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 04:35:33,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054401564] [2020-09-25 04:35:33,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 04:35:33,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 04:35:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:35:33,981 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-09-25 04:35:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:34,021 INFO L93 Difference]: Finished difference Result 134 states and 203 transitions. [2020-09-25 04:35:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 04:35:34,022 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-09-25 04:35:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:34,035 INFO L225 Difference]: With dead ends: 134 [2020-09-25 04:35:34,036 INFO L226 Difference]: Without dead ends: 69 [2020-09-25 04:35:34,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 04:35:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-25 04:35:34,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-09-25 04:35:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 04:35:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-09-25 04:35:34,103 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 19 [2020-09-25 04:35:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:34,104 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-09-25 04:35:34,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 04:35:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-09-25 04:35:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 04:35:34,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:34,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:34,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:35:34,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:34,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 471335344, now seen corresponding path program 1 times [2020-09-25 04:35:34,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:34,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426028390] [2020-09-25 04:35:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:34,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:34,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:34,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 04:35:34,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-09-25 04:35:34,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:34,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:35:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:34,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 04:35:34,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:34,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:34,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:34,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:34,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:34,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:34,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:34,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:34,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:34,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:34,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:34,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426028390] [2020-09-25 04:35:34,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:34,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:35:34,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70780295] [2020-09-25 04:35:34,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:35:34,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:35:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:35:34,515 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 5 states. [2020-09-25 04:35:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:34,711 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-09-25 04:35:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:35:34,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-25 04:35:34,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:34,717 INFO L225 Difference]: With dead ends: 91 [2020-09-25 04:35:34,717 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 04:35:34,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:35:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 04:35:34,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-09-25 04:35:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 04:35:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-09-25 04:35:34,747 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 20 [2020-09-25 04:35:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:34,747 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-09-25 04:35:34,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:35:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-09-25 04:35:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 04:35:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:34,749 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:34,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:35:34,750 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1383579147, now seen corresponding path program 1 times [2020-09-25 04:35:34,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:34,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54160612] [2020-09-25 04:35:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:34,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 04:35:35,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-09-25 04:35:35,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:35:35,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 04:35:35,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 04:35:35,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:35:35,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:35,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:35,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:35,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:35,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:35,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:35,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:35,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-25 04:35:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:35,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:35,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:35:35,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:35,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:35,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:35,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54160612] [2020-09-25 04:35:35,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:35,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:35:35,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854350707] [2020-09-25 04:35:35,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:35:35,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:35,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:35:35,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:35:35,187 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 5 states. [2020-09-25 04:35:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:35,318 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2020-09-25 04:35:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:35:35,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 04:35:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:35,323 INFO L225 Difference]: With dead ends: 88 [2020-09-25 04:35:35,324 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 04:35:35,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:35:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 04:35:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-09-25 04:35:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 04:35:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2020-09-25 04:35:35,337 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 25 [2020-09-25 04:35:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:35,337 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2020-09-25 04:35:35,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:35:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2020-09-25 04:35:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 04:35:35,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:35,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:35,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:35:35,340 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 344115466, now seen corresponding path program 1 times [2020-09-25 04:35:35,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:35,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731880307] [2020-09-25 04:35:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 04:35:35,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:35,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-09-25 04:35:35,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:35:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 04:35:35,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:35,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:35,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:35,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:35,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:35,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:35,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:35,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:35,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:35,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:35,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:35,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:35,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:35,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:35,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731880307] [2020-09-25 04:35:35,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:35,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:35:35,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752436660] [2020-09-25 04:35:35,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:35:35,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:35,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:35:35,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:35:35,522 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand 7 states. [2020-09-25 04:35:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:35,679 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-09-25 04:35:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 04:35:35,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-25 04:35:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:35,681 INFO L225 Difference]: With dead ends: 90 [2020-09-25 04:35:35,681 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 04:35:35,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 04:35:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-25 04:35:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 04:35:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2020-09-25 04:35:35,694 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2020-09-25 04:35:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:35,694 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2020-09-25 04:35:35,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:35:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2020-09-25 04:35:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 04:35:35,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:35,696 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:35,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:35:35,697 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1469174755, now seen corresponding path program 1 times [2020-09-25 04:35:35,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:35,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691164990] [2020-09-25 04:35:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:35,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 04:35:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 04:35:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1431 [2020-09-25 04:35:37,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:35:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 04:35:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:37,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:37,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:37,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:37,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:35:37,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:37,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:37,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:37,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:37,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-25 04:35:37,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691164990] [2020-09-25 04:35:37,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:37,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:35:37,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001935896] [2020-09-25 04:35:37,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:35:37,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:35:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:35:37,234 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand 7 states. [2020-09-25 04:35:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:37,418 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 04:35:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 04:35:37,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-25 04:35:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:37,420 INFO L225 Difference]: With dead ends: 94 [2020-09-25 04:35:37,420 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 04:35:37,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 04:35:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-09-25 04:35:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 04:35:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2020-09-25 04:35:37,432 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 38 [2020-09-25 04:35:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:37,433 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2020-09-25 04:35:37,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:35:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2020-09-25 04:35:37,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 04:35:37,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:37,435 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:37,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:35:37,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash 859677550, now seen corresponding path program 1 times [2020-09-25 04:35:37,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:37,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408516578] [2020-09-25 04:35:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 04:35:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-09-25 04:35:37,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:35:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 04:35:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:37,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:37,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:37,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:37,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:37,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:35:37,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:37,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:37,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:37,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:37,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:37,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:37,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:37,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:37,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:37,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:37,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:37,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 04:35:37,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408516578] [2020-09-25 04:35:37,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:37,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:35:37,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346930952] [2020-09-25 04:35:37,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:35:37,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:37,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:35:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:35:37,867 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand 7 states. [2020-09-25 04:35:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:38,052 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2020-09-25 04:35:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 04:35:38,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-09-25 04:35:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:38,054 INFO L225 Difference]: With dead ends: 91 [2020-09-25 04:35:38,054 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 04:35:38,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 04:35:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2020-09-25 04:35:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-25 04:35:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-09-25 04:35:38,077 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 41 [2020-09-25 04:35:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:38,081 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-09-25 04:35:38,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:35:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-09-25 04:35:38,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 04:35:38,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:38,085 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:38,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:35:38,085 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash -943144682, now seen corresponding path program 1 times [2020-09-25 04:35:38,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:38,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229550663] [2020-09-25 04:35:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:38,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:38,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 04:35:38,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:38,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-09-25 04:35:38,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:38,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:35:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:38,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 04:35:38,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:38,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:38,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:38,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:38,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:38,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:38,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:38,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:38,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:38,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:38,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:38,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:38,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:38,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:38,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:38,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:38,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:38,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:38,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:38,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:38,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:38,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:38,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:38,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:38,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:38,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:38,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 04:35:38,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229550663] [2020-09-25 04:35:38,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:38,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:35:38,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062947381] [2020-09-25 04:35:38,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:35:38,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:35:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:35:38,518 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 7 states. [2020-09-25 04:35:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:38,702 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2020-09-25 04:35:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 04:35:38,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-09-25 04:35:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:38,706 INFO L225 Difference]: With dead ends: 120 [2020-09-25 04:35:38,707 INFO L226 Difference]: Without dead ends: 118 [2020-09-25 04:35:38,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-25 04:35:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2020-09-25 04:35:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-25 04:35:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-09-25 04:35:38,727 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 44 [2020-09-25 04:35:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:38,727 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-09-25 04:35:38,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:35:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-09-25 04:35:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 04:35:38,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:38,736 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:38,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 04:35:38,737 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:38,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1177695863, now seen corresponding path program 2 times [2020-09-25 04:35:38,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:38,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071222562] [2020-09-25 04:35:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:38,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:38,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:39,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:39,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 04:35:39,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:39,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 762 [2020-09-25 04:35:39,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:39,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:35:39,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:39,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:35:39,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:39,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:39,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:39,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:39,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:39,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:39,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:39,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:39,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:39,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:39,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:39,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:39,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:39,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:35:39,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:39,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:39,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:39,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:39,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:39,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:39,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:39,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:39,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:39,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:35:39,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:39,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:39,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:39,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:39,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 04:35:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:39,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:39,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:39,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:39,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:35:39,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:39,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:39,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:39,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 04:35:39,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071222562] [2020-09-25 04:35:39,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:35:39,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287746018] [2020-09-25 04:35:39,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:39,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:39,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:39,733 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 9 states. [2020-09-25 04:35:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:40,116 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2020-09-25 04:35:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:35:40,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-09-25 04:35:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:40,118 INFO L225 Difference]: With dead ends: 132 [2020-09-25 04:35:40,119 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 04:35:40,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:35:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 04:35:40,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-25 04:35:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-25 04:35:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2020-09-25 04:35:40,143 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 46 [2020-09-25 04:35:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:40,144 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2020-09-25 04:35:40,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:40,144 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2020-09-25 04:35:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 04:35:40,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:40,149 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:40,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 04:35:40,150 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1826770767, now seen corresponding path program 1 times [2020-09-25 04:35:40,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:40,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952113687] [2020-09-25 04:35:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:41,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 04:35:41,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:41,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-09-25 04:35:41,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:41,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:41,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 04:35:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:41,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:41,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:41,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:41,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:41,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:41,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:41,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:41,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:41,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:41,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 04:35:41,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:41,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:41,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:41,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:41,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:41,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:41,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:41,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:35:41,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:41,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:41,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:41,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:35:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:41,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:41,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:41,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:41,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:35:41,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:41,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:41,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:41,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 04:35:41,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952113687] [2020-09-25 04:35:41,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:41,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 04:35:41,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585879545] [2020-09-25 04:35:41,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:41,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:41,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:41,336 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand 9 states. [2020-09-25 04:35:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:41,632 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-09-25 04:35:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:35:41,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 04:35:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:41,634 INFO L225 Difference]: With dead ends: 139 [2020-09-25 04:35:41,634 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 04:35:41,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:35:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 04:35:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2020-09-25 04:35:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-25 04:35:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2020-09-25 04:35:41,652 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 49 [2020-09-25 04:35:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:41,653 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2020-09-25 04:35:41,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2020-09-25 04:35:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 04:35:41,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:41,656 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:41,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 04:35:41,656 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1519048418, now seen corresponding path program 1 times [2020-09-25 04:35:41,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:41,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226030340] [2020-09-25 04:35:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:41,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:42,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:42,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 04:35:42,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:42,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-09-25 04:35:42,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:42,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 04:35:42,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:43,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:43,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:43,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:43,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:35:43,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:43,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:43,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:43,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:43,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:43,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:43,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:43,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:43,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:43,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:35:43,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:43,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:43,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:43,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:43,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:43,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:43,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:43,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:43,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:43,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:43,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:43,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:43,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:43,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:35:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:43,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:43,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:43,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:35:43,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:43,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:43,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:43,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:43,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:35:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:43,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:43,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:43,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 04:35:43,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:43,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:43,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:43,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 04:35:43,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226030340] [2020-09-25 04:35:43,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:43,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 04:35:43,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190687433] [2020-09-25 04:35:43,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:43,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:43,111 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 9 states. [2020-09-25 04:35:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:43,298 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2020-09-25 04:35:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:35:43,299 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-09-25 04:35:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:43,300 INFO L225 Difference]: With dead ends: 146 [2020-09-25 04:35:43,301 INFO L226 Difference]: Without dead ends: 144 [2020-09-25 04:35:43,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:35:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-25 04:35:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2020-09-25 04:35:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-25 04:35:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2020-09-25 04:35:43,318 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 58 [2020-09-25 04:35:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:43,320 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2020-09-25 04:35:43,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2020-09-25 04:35:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 04:35:43,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:43,322 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:43,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 04:35:43,322 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1733407875, now seen corresponding path program 1 times [2020-09-25 04:35:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:43,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775500808] [2020-09-25 04:35:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:43,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:43,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 04:35:44,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:44,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1286 [2020-09-25 04:35:44,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:44,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 04:35:44,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:44,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:44,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:44,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:44,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:44,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:44,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:44,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:44,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:44,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:44,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:44,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:44,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:35:44,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:44,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:44,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:44,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 04:35:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:44,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:44,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:44,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:44,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:44,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:44,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:44,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:44,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 04:35:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:44,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:44,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:44,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:44,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:35:44,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:44,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:44,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:44,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:44,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:44,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 04:35:44,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775500808] [2020-09-25 04:35:44,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:44,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 04:35:44,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704317095] [2020-09-25 04:35:44,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:44,756 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand 9 states. [2020-09-25 04:35:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:44,966 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-09-25 04:35:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:35:44,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-09-25 04:35:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:44,969 INFO L225 Difference]: With dead ends: 169 [2020-09-25 04:35:44,970 INFO L226 Difference]: Without dead ends: 167 [2020-09-25 04:35:44,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:35:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-25 04:35:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2020-09-25 04:35:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-25 04:35:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2020-09-25 04:35:44,987 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 62 [2020-09-25 04:35:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:44,987 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2020-09-25 04:35:44,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2020-09-25 04:35:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 04:35:44,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:44,990 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:44,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 04:35:44,991 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1967257859, now seen corresponding path program 1 times [2020-09-25 04:35:44,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:44,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240998518] [2020-09-25 04:35:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:45,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:45,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:35:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 04:35:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 04:35:50,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:50,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:50,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:50,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:50,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:50,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:50,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:50,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:50,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:50,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:50,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:50,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:50,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:50,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:35:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:50,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:50,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:50,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:50,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:35:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:50,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:35:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:35:50,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-25 04:35:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:50,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:50,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:50,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 04:35:50,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:50,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:50,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:50,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 04:35:50,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240998518] [2020-09-25 04:35:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:50,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:35:50,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510903322] [2020-09-25 04:35:50,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:35:50,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:35:50,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:50,199 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand 10 states. [2020-09-25 04:35:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:50,425 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-09-25 04:35:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:35:50,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-09-25 04:35:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:50,427 INFO L225 Difference]: With dead ends: 168 [2020-09-25 04:35:50,428 INFO L226 Difference]: Without dead ends: 166 [2020-09-25 04:35:50,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:35:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-25 04:35:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-09-25 04:35:50,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-25 04:35:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 194 transitions. [2020-09-25 04:35:50,449 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 194 transitions. Word has length 63 [2020-09-25 04:35:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:50,449 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 194 transitions. [2020-09-25 04:35:50,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:35:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 194 transitions. [2020-09-25 04:35:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 04:35:50,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:50,451 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:50,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 04:35:50,452 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:50,452 INFO L82 PathProgramCache]: Analyzing trace with hash 659292836, now seen corresponding path program 3 times [2020-09-25 04:35:50,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:50,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359112620] [2020-09-25 04:35:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:50,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-25 04:35:54,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:54,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4389 [2020-09-25 04:35:54,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:35:54,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 04:35:54,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 04:35:54,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:54,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:54,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:54,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:54,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:54,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:54,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:54,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:54,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:54,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:54,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:54,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:54,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:54,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:54,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 04:35:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:54,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:35:54,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:54,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:54,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 04:35:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:54,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:54,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:35:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:35:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:54,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-25 04:35:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:54,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:54,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:54,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:54,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:54,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:54,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:54,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:54,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:54,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-25 04:35:54,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359112620] [2020-09-25 04:35:54,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:54,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:35:54,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872835359] [2020-09-25 04:35:54,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:54,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:54,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:54,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:54,994 INFO L87 Difference]: Start difference. First operand 166 states and 194 transitions. Second operand 9 states. [2020-09-25 04:35:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:55,195 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2020-09-25 04:35:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:35:55,197 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2020-09-25 04:35:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:55,199 INFO L225 Difference]: With dead ends: 170 [2020-09-25 04:35:55,199 INFO L226 Difference]: Without dead ends: 168 [2020-09-25 04:35:55,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:35:55,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-25 04:35:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-09-25 04:35:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-25 04:35:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2020-09-25 04:35:55,210 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 64 [2020-09-25 04:35:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:55,211 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2020-09-25 04:35:55,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2020-09-25 04:35:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 04:35:55,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:55,212 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:55,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 04:35:55,212 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash -822659134, now seen corresponding path program 1 times [2020-09-25 04:35:55,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:55,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002002768] [2020-09-25 04:35:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:55,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:55,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 04:35:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:56,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-09-25 04:35:56,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 04:35:56,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-25 04:35:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:56,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:56,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:56,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:35:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:56,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:35:56,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:56,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:56,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:56,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:35:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:56,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:56,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:56,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:56,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:56,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:35:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:56,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:56,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:35:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:56,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:56,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:56,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:35:56,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:56,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:56,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:56,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:35:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 04:35:56,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002002768] [2020-09-25 04:35:56,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:35:56,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 04:35:56,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397685932] [2020-09-25 04:35:56,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:35:56,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:35:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:35:56,471 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand 9 states. [2020-09-25 04:35:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:56,711 INFO L93 Difference]: Finished difference Result 201 states and 236 transitions. [2020-09-25 04:35:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:35:56,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-25 04:35:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:56,713 INFO L225 Difference]: With dead ends: 201 [2020-09-25 04:35:56,713 INFO L226 Difference]: Without dead ends: 199 [2020-09-25 04:35:56,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:35:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-25 04:35:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2020-09-25 04:35:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-25 04:35:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2020-09-25 04:35:56,731 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 65 [2020-09-25 04:35:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:56,731 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2020-09-25 04:35:56,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:35:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2020-09-25 04:35:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 04:35:56,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:56,738 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:56,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 04:35:56,739 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1510377470, now seen corresponding path program 1 times [2020-09-25 04:35:56,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:56,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987411990] [2020-09-25 04:35:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:59,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 04:35:59,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:35:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3203 [2020-09-25 04:35:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:59,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:35:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 04:35:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 04:35:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:00,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:36:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:36:00,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:36:00,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:00,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:00,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:36:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:00,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:00,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:00,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:36:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:00,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:36:00,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:00,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:00,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:00,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 04:36:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:00,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:36:00,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:00,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:00,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 04:36:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:36:00,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:36:00,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:00,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 04:36:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:00,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:00,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:00,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-25 04:36:00,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987411990] [2020-09-25 04:36:00,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:36:00,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:36:00,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757530831] [2020-09-25 04:36:00,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:36:00,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:36:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:36:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:36:00,117 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand 10 states. [2020-09-25 04:36:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:36:00,396 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2020-09-25 04:36:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:36:00,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-09-25 04:36:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:36:00,399 INFO L225 Difference]: With dead ends: 202 [2020-09-25 04:36:00,399 INFO L226 Difference]: Without dead ends: 197 [2020-09-25 04:36:00,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-25 04:36:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-25 04:36:00,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-09-25 04:36:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-25 04:36:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2020-09-25 04:36:00,411 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 67 [2020-09-25 04:36:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:36:00,411 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2020-09-25 04:36:00,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:36:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2020-09-25 04:36:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 04:36:00,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:36:00,413 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:36:00,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 04:36:00,413 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:36:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:36:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash 869213219, now seen corresponding path program 2 times [2020-09-25 04:36:00,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:36:00,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566131400] [2020-09-25 04:36:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:36:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:00,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:00,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4206 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 04:36:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-09-25 04:36:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:36:04,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:04,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:36:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:36:04,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:36:04,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:04,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:04,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:36:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:04,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:04,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:04,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:04,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:36:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:04,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:04,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:04,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:04,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:36:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:04,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:36:04,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:04,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:36:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:04,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:36:04,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 04:36:04,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:36:04,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:04,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-25 04:36:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:04,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:04,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:04,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:04,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:36:04,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:04,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 04:36:04,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566131400] [2020-09-25 04:36:04,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:36:04,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:36:04,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260706119] [2020-09-25 04:36:04,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:36:04,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:36:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:36:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:36:04,797 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand 9 states. [2020-09-25 04:36:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:36:05,070 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2020-09-25 04:36:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:36:05,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-09-25 04:36:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:36:05,072 INFO L225 Difference]: With dead ends: 201 [2020-09-25 04:36:05,072 INFO L226 Difference]: Without dead ends: 196 [2020-09-25 04:36:05,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:36:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-25 04:36:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-09-25 04:36:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-25 04:36:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2020-09-25 04:36:05,094 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 70 [2020-09-25 04:36:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:36:05,097 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2020-09-25 04:36:05,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:36:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2020-09-25 04:36:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 04:36:05,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:36:05,099 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:36:05,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 04:36:05,099 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:36:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:36:05,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1269119089, now seen corresponding path program 1 times [2020-09-25 04:36:05,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:36:05,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179317435] [2020-09-25 04:36:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:36:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:05,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:05,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:05,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 04:36:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:36:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:36:10,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:36:10,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:10,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:10,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:36:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:10,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:36:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:10,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:10,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 04:36:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:10,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 04:36:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:10,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:10,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 04:36:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:36:10,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:36:10,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:36:10,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 04:36:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:10,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:10,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:10,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:36:10,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:10,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:10,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:10,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:10,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:36:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-25 04:36:10,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179317435] [2020-09-25 04:36:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:36:10,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:36:10,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692982364] [2020-09-25 04:36:10,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:36:10,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:36:10,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:36:10,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:36:10,256 INFO L87 Difference]: Start difference. First operand 194 states and 224 transitions. Second operand 9 states. [2020-09-25 04:36:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:36:10,535 INFO L93 Difference]: Finished difference Result 202 states and 231 transitions. [2020-09-25 04:36:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:36:10,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-09-25 04:36:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:36:10,538 INFO L225 Difference]: With dead ends: 202 [2020-09-25 04:36:10,538 INFO L226 Difference]: Without dead ends: 200 [2020-09-25 04:36:10,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:36:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-25 04:36:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2020-09-25 04:36:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-09-25 04:36:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 218 transitions. [2020-09-25 04:36:10,554 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 218 transitions. Word has length 76 [2020-09-25 04:36:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:36:10,555 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 218 transitions. [2020-09-25 04:36:10,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:36:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 218 transitions. [2020-09-25 04:36:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 04:36:10,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:36:10,557 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:36:10,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 04:36:10,558 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:36:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:36:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 341113206, now seen corresponding path program 1 times [2020-09-25 04:36:10,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:36:10,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724910252] [2020-09-25 04:36:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:36:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:10,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-09-25 04:36:15,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 04:36:15,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:36:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:36:15,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 04:36:15,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 04:36:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:15,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:15,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:15,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 04:36:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:15,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-25 04:36:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:36:15,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:15,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:15,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:36:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:36:15,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-25 04:36:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:36:15,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:36:15,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:36:15,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-25 04:36:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:36:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:36:15,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:36:15,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:36:15,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:36:15,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:36:15,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:36:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-25 04:36:15,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724910252] [2020-09-25 04:36:15,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:36:15,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:36:15,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170093473] [2020-09-25 04:36:15,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:36:15,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:36:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:36:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:36:15,697 INFO L87 Difference]: Start difference. First operand 189 states and 218 transitions. Second operand 9 states. [2020-09-25 04:36:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:36:15,938 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2020-09-25 04:36:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:36:15,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-09-25 04:36:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:36:15,939 INFO L225 Difference]: With dead ends: 197 [2020-09-25 04:36:15,940 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 04:36:15,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:36:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 04:36:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 04:36:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 04:36:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 04:36:15,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-09-25 04:36:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:36:15,946 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 04:36:15,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:36:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 04:36:15,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 04:36:15,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 04:36:15,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 04:36:16,688 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 04:36:16,688 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 04:36:16,688 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 04:36:16,689 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 04:36:16,689 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 04:36:16,689 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 04:36:16,689 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 04:36:16,689 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 04:36:16,689 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 04:36:16,690 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 04:36:16,690 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 04:36:16,690 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L60-1(line 60) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L27-1(lines 27 29) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L27-2(line 27) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L27-3(line 27) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2020-09-25 04:36:16,691 INFO L268 CegarLoopResult]: For program point L44-1(lines 44 53) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L44-2(line 44) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L44-4(line 44) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-25 04:36:16,692 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-25 04:36:16,693 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2020-09-25 04:36:16,693 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2020-09-25 04:36:16,693 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-09-25 04:36:16,693 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) [2020-09-25 04:36:16,694 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (or (< 1 main_~tagbuf_len~0) (= main_~tagbuf_len~0 1)) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-25 04:36:16,695 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (let ((.cse0 (<= main_~t~0 main_~tagbuf_len~0))) (or (and .cse0 (<= 1 main_~t~0)) (and .cse0 (= main_~t~0 0)))) [2020-09-25 04:36:16,697 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (or (and (< main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) (and (= main_~t~0 0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))) [2020-09-25 04:36:16,697 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-09-25 04:36:16,697 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed. [2020-09-25 04:36:16,697 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-09-25 04:36:16,697 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-09-25 04:36:16,697 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (or (and (< main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) (and (= main_~t~0 0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))) [2020-09-25 04:36:16,697 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-09-25 04:36:16,698 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (or (and (< main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) (and (= main_~t~0 0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))) [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L55-1(lines 55 57) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L55-2(line 55) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L55-3(line 55) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L47(line 47) no Hoare annotation was computed. [2020-09-25 04:36:16,698 INFO L268 CegarLoopResult]: For program point L47-1(line 47) no Hoare annotation was computed. [2020-09-25 04:36:16,699 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-25 04:36:16,699 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-25 04:36:16,699 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-25 04:36:16,699 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-25 04:36:16,699 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-25 04:36:16,699 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-09-25 04:36:16,699 INFO L268 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-09-25 04:36:16,699 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-09-25 04:36:16,700 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-09-25 04:36:16,700 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 04:36:16,701 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (<= main_~t~0 main_~tagbuf_len~0) [2020-09-25 04:36:16,701 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2020-09-25 04:36:16,701 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 04:36:16,701 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L17-2(line 17) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (or (and (< main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0)) (and (= main_~t~0 0) (<= (+ main_~t~0 1) main_~tagbuf_len~0))) [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-09-25 04:36:16,702 INFO L268 CegarLoopResult]: For program point L43-1(lines 43 57) no Hoare annotation was computed. [2020-09-25 04:36:16,703 INFO L268 CegarLoopResult]: For program point L43-2(line 43) no Hoare annotation was computed. [2020-09-25 04:36:16,703 INFO L268 CegarLoopResult]: For program point L43-3(line 43) no Hoare annotation was computed. [2020-09-25 04:36:16,703 INFO L264 CegarLoopResult]: At program point L43-4(lines 43 57) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2020-09-25 04:36:16,703 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-09-25 04:36:16,704 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 04:36:16,704 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 04:36:16,704 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 04:36:16,704 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 04:36:16,704 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 04:36:16,704 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 04:36:16,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:36:16 BoogieIcfgContainer [2020-09-25 04:36:16,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:36:16,735 INFO L168 Benchmark]: Toolchain (without parser) took 44146.56 ms. Allocated memory was 140.5 MB in the beginning and 404.2 MB in the end (delta: 263.7 MB). Free memory was 104.1 MB in the beginning and 343.4 MB in the end (delta: -239.3 MB). Peak memory consumption was 278.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,737 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.87 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,744 INFO L168 Benchmark]: Boogie Preprocessor took 131.84 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,747 INFO L168 Benchmark]: RCFGBuilder took 431.12 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 163.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,748 INFO L168 Benchmark]: TraceAbstraction took 43267.16 ms. Allocated memory was 203.4 MB in the beginning and 404.2 MB in the end (delta: 200.8 MB). Free memory was 162.7 MB in the beginning and 343.4 MB in the end (delta: -180.6 MB). Peak memory consumption was 274.1 MB. Max. memory is 7.1 GB. [2020-09-25 04:36:16,756 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.87 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.84 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 431.12 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 163.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 43267.16 ms. Allocated memory was 203.4 MB in the beginning and 404.2 MB in the end (delta: 200.8 MB). Free memory was 162.7 MB in the beginning and 343.4 MB in the end (delta: -180.6 MB). Peak memory consumption was 274.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (t <= tagbuf_len && 1 <= t) || (t <= tagbuf_len && t == 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 1 <= t - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42.3s, OverallIterations: 18, TraceHistogramMax: 7, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1368 SDtfs, 701 SDslu, 5828 SDs, 0 SdLazy, 2505 SolverSat, 216 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 349 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=197occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 67 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 82 PreInvPairs, 131 NumberOfFragments, 188 HoareAnnotationTreeSize, 82 FomulaSimplifications, 951 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 24 FomulaSimplificationsInter, 856 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 37.4s InterpolantComputationTime, 914 NumberOfCodeBlocks, 914 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 896 ConstructedInterpolants, 0 QuantifiedInterpolants, 112431 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 11 PerfectInterpolantSequences, 538/582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...