/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:16:49,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:16:49,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:16:49,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:16:49,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:16:49,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:16:49,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:16:49,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:16:49,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:16:49,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:16:49,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:16:49,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:16:49,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:16:49,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:16:49,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:16:49,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:16:49,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:16:49,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:16:49,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:16:49,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:16:49,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:16:49,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:16:49,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:16:49,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:16:49,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:16:49,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:16:49,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:16:49,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:16:49,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:16:49,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:16:49,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:16:49,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:16:49,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:16:49,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:16:49,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:16:49,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:16:49,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:16:49,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:16:49,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:16:49,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:16:49,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:16:49,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:16:49,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:16:49,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:16:49,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:16:49,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:16:49,829 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:16:49,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:16:49,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:16:49,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:16:49,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:16:49,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:16:49,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:16:49,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:16:49,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:16:49,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:16:49,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:16:49,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:16:49,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:16:49,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:16:49,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:16:49,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:16:49,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:16:49,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:16:49,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:16:49,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:16:49,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:16:49,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:16:49,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:16:49,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:16:49,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:16:49,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:16:50,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:16:50,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:16:50,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:16:50,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:16:50,177 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:16:50,177 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-14 05:16:50,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054b142a3/31e9c39ca620453a8a3dfd8b607aca0b/FLAGf0210d425 [2020-10-14 05:16:50,638 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:16:50,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-14 05:16:50,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054b142a3/31e9c39ca620453a8a3dfd8b607aca0b/FLAGf0210d425 [2020-10-14 05:16:51,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/054b142a3/31e9c39ca620453a8a3dfd8b607aca0b [2020-10-14 05:16:51,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:16:51,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:16:51,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:16:51,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:16:51,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:16:51,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51, skipping insertion in model container [2020-10-14 05:16:51,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:16:51,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:16:51,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:16:51,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:16:51,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:16:51,388 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:16:51,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51 WrapperNode [2020-10-14 05:16:51,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:16:51,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:16:51,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:16:51,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:16:51,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... [2020-10-14 05:16:51,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:16:51,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:16:51,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:16:51,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:16:51,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:16:51,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:16:51,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:16:51,578 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:16:51,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:16:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:16:51,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:16:51,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:16:51,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:16:53,977 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:16:53,978 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:16:53,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:16:53 BoogieIcfgContainer [2020-10-14 05:16:53,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:16:53,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:16:53,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:16:53,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:16:53,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:16:51" (1/3) ... [2020-10-14 05:16:53,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54944f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:16:53, skipping insertion in model container [2020-10-14 05:16:53,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:51" (2/3) ... [2020-10-14 05:16:53,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54944f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:16:53, skipping insertion in model container [2020-10-14 05:16:53,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:16:53" (3/3) ... [2020-10-14 05:16:53,990 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2020-10-14 05:16:54,000 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:16:54,007 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:16:54,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:16:54,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:16:54,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:16:54,046 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:16:54,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:16:54,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:16:54,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:16:54,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:16:54,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:16:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 05:16:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:16:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:54,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:54,073 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -956066777, now seen corresponding path program 1 times [2020-10-14 05:16:54,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:54,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535829954] [2020-10-14 05:16:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:54,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:16:54,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:54,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-14 05:16:54,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:54,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:54,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:16:54,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:54,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:16:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:54,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:54,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:54,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:54,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 05:16:54,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:54,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:54,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:54,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:54,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535829954] [2020-10-14 05:16:54,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:16:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:16:54,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633417832] [2020-10-14 05:16:54,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:16:54,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:16:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:16:54,675 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-14 05:16:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:54,773 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-10-14 05:16:54,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:16:54,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:16:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:54,786 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:16:54,786 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:16:54,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:16:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:16:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:16:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:16:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 05:16:54,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-14 05:16:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:54,830 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 05:16:54,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:16:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 05:16:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:16:54,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:54,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:54,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:16:54,833 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:54,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1471973101, now seen corresponding path program 1 times [2020-10-14 05:16:54,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:54,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176302772] [2020-10-14 05:16:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:54,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:55,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:55,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:16:55,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:55,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-14 05:16:55,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:55,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:16:55,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 05:16:55,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:16:55,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:16:59,406 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-10-14 05:16:59,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:59,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:59,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:59,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:59,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:59,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:16:59,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:59,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:59,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:59,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:59,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:59,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176302772] [2020-10-14 05:16:59,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:16:59,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:16:59,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178487869] [2020-10-14 05:16:59,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:16:59,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:59,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:16:59,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:16:59,442 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-14 05:16:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:59,572 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-14 05:16:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:16:59,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:16:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:59,574 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:16:59,574 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 05:16:59,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:16:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 05:16:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-10-14 05:16:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:16:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-14 05:16:59,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2020-10-14 05:16:59,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:59,586 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-14 05:16:59,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:16:59,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-14 05:16:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:16:59,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:59,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:59,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:16:59,588 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1468219435, now seen corresponding path program 1 times [2020-10-14 05:16:59,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:59,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457317846] [2020-10-14 05:16:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:59,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:59,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:16:59,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:59,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-14 05:16:59,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:59,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:16:59,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:59,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:16:59,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:59,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:59,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:59,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:59,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:59,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:16:59,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:59,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:59,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:59,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:59,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457317846] [2020-10-14 05:16:59,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:16:59,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:16:59,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95592314] [2020-10-14 05:16:59,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:16:59,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:16:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:16:59,685 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-14 05:17:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:01,841 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-14 05:17:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:17:01,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:17:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:01,844 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:17:01,844 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:17:01,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:17:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:17:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-14 05:17:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:17:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:17:01,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2020-10-14 05:17:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:01,858 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:17:01,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:17:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:17:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:17:01,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:01,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:01,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:17:01,861 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash 534952077, now seen corresponding path program 1 times [2020-10-14 05:17:01,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:01,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977844263] [2020-10-14 05:17:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:02,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:02,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:17:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-14 05:17:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:02,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:17:02,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:02,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:17:02,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:02,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:02,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:02,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:02,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:02,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:02,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:17:02,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:02,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:02,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:02,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:02,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977844263] [2020-10-14 05:17:02,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:02,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:17:02,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120502507] [2020-10-14 05:17:02,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:17:02,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:02,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:17:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:17:02,360 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-14 05:17:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:04,568 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-14 05:17:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:17:04,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:17:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:04,570 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:17:04,570 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:17:04,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:17:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:17:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-14 05:17:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:17:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:17:04,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2020-10-14 05:17:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:04,578 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:17:04,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:17:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:17:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:17:04,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:04,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:04,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:17:04,580 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:04,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:04,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1313185903, now seen corresponding path program 2 times [2020-10-14 05:17:04,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:04,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524282925] [2020-10-14 05:17:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:04,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:04,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:05,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:05,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:17:05,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:05,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-14 05:17:05,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:05,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:17:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:17:05,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:05,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:05,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:05,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:05,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:05,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:05,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:17:05,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:05,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:05,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524282925] [2020-10-14 05:17:05,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:05,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:17:05,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993391481] [2020-10-14 05:17:05,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:17:05,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:17:05,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:17:05,173 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-10-14 05:17:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:05,295 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-14 05:17:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:17:05,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 05:17:05,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:05,297 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:17:05,297 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:17:05,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:17:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:17:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-14 05:17:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:17:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-14 05:17:05,305 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2020-10-14 05:17:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:05,306 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-14 05:17:05,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:17:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-14 05:17:05,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:17:05,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:05,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:05,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:17:05,307 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:05,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1871583185, now seen corresponding path program 3 times [2020-10-14 05:17:05,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:05,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383202350] [2020-10-14 05:17:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:05,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:06,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:06,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:17:06,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:06,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-14 05:17:06,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:06,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:06,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:17:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:06,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:17:06,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:06,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:06,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:06,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:06,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:06,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:17:06,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:06,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:06,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:06,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:06,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383202350] [2020-10-14 05:17:06,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:06,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:17:06,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076880044] [2020-10-14 05:17:06,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:17:06,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:06,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:17:06,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:17:06,241 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-10-14 05:17:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:08,484 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-10-14 05:17:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:17:08,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:17:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:08,486 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:17:08,486 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:17:08,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:17:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:17:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-14 05:17:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:17:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-14 05:17:08,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2020-10-14 05:17:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:08,497 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-14 05:17:08,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:17:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-14 05:17:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:17:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:08,498 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:08,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:17:08,498 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1620459187, now seen corresponding path program 4 times [2020-10-14 05:17:08,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:08,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650476032] [2020-10-14 05:17:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:08,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:09,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:09,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:17:09,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:09,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-14 05:17:09,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:09,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:17:09,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:17:09,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:09,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:09,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:09,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:09,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:09,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:09,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:09,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:09,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:09,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:09,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:09,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650476032] [2020-10-14 05:17:09,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:09,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:17:09,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289815478] [2020-10-14 05:17:09,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:17:09,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:17:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:17:09,837 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2020-10-14 05:17:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:12,171 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-14 05:17:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:17:12,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 05:17:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:12,173 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:17:12,173 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:17:12,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:17:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:17:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-14 05:17:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:17:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-14 05:17:12,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 22 [2020-10-14 05:17:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:12,191 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-14 05:17:12,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:17:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-14 05:17:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:17:12,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:12,193 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:12,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:17:12,193 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:12,194 INFO L82 PathProgramCache]: Analyzing trace with hash 808465685, now seen corresponding path program 5 times [2020-10-14 05:17:12,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:12,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468170213] [2020-10-14 05:17:12,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:12,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:12,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:14,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:14,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:17:14,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:14,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1865 [2020-10-14 05:17:14,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:14,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:14,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:17:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:14,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:17:14,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:14,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:14,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:14,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:14,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:14,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:14,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:17:14,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:14,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:14,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:14,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:14,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:14,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:14,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468170213] [2020-10-14 05:17:14,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:14,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:17:14,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718654229] [2020-10-14 05:17:14,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:17:14,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:17:14,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:17:14,266 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 9 states. [2020-10-14 05:17:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:16,763 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2020-10-14 05:17:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:17:16,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:17:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:16,765 INFO L225 Difference]: With dead ends: 97 [2020-10-14 05:17:16,765 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:17:16,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:17:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:17:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2020-10-14 05:17:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:17:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2020-10-14 05:17:16,778 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2020-10-14 05:17:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:16,779 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2020-10-14 05:17:16,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:17:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2020-10-14 05:17:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:17:16,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:16,780 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:16,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:17:16,780 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2128209161, now seen corresponding path program 6 times [2020-10-14 05:17:16,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:16,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42635579] [2020-10-14 05:17:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:17,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:18,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:18,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:17:18,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:18,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-10-14 05:17:18,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:18,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:17:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:17:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:18,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:18,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:18,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:18,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:18,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:17:18,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:18,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:18,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:18,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42635579] [2020-10-14 05:17:18,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:18,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:17:18,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299971951] [2020-10-14 05:17:18,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:17:18,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:17:18,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:17:18,964 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 10 states. [2020-10-14 05:17:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:21,369 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2020-10-14 05:17:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:17:21,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 05:17:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:21,371 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:17:21,371 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 05:17:21,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:17:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 05:17:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-14 05:17:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 05:17:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-14 05:17:21,386 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2020-10-14 05:17:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:21,387 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-14 05:17:21,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:17:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-14 05:17:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:17:21,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:21,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:21,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:17:21,388 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1815744601, now seen corresponding path program 7 times [2020-10-14 05:17:21,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:21,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411740866] [2020-10-14 05:17:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:24,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:17:24,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3451 [2020-10-14 05:17:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:24,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:24,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:17:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:17:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:24,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:24,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:24,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:24,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:24,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:24,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:24,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:24,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:24,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:24,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:25,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411740866] [2020-10-14 05:17:25,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:25,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:17:25,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624495501] [2020-10-14 05:17:25,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:17:25,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:17:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:17:25,005 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 11 states. [2020-10-14 05:17:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:25,401 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2020-10-14 05:17:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:17:25,402 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:17:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:25,403 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:17:25,403 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:17:25,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:17:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:17:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-14 05:17:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:17:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-14 05:17:25,413 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 28 [2020-10-14 05:17:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:25,414 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-14 05:17:25,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:17:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-14 05:17:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:17:25,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:25,415 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:25,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:17:25,416 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -500812485, now seen corresponding path program 8 times [2020-10-14 05:17:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:25,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716596977] [2020-10-14 05:17:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:25,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:25,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:29,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:29,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:17:29,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:29,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4234 [2020-10-14 05:17:29,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:29,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:17:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:29,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:17:29,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:31,964 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 5 [2020-10-14 05:17:32,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:32,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:32,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:32,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:32,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:17:32,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:32,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:32,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:17:32,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716596977] [2020-10-14 05:17:32,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:32,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:17:32,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454070296] [2020-10-14 05:17:32,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:17:32,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:17:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:17:32,152 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 9 states. [2020-10-14 05:17:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:34,382 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-14 05:17:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:17:34,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:17:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:34,384 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:17:34,384 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 05:17:34,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:17:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 05:17:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-14 05:17:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:17:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-10-14 05:17:34,401 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 30 [2020-10-14 05:17:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:34,403 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-10-14 05:17:34,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:17:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-10-14 05:17:34,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 05:17:34,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:34,408 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:34,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:17:34,409 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash 507771359, now seen corresponding path program 1 times [2020-10-14 05:17:34,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:34,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885023403] [2020-10-14 05:17:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:34,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:39,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:39,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 05:17:39,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:39,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4703 [2020-10-14 05:17:39,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:39,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:39,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:17:39,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:39,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:17:39,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:39,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:39,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:39,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:39,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:39,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:39,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:39,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:39,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-14 05:17:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:39,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:39,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:39,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:17:39,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:39,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:39,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:39,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:39,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:39,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:17:39,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:39,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:17:39,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885023403] [2020-10-14 05:17:39,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:39,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:17:39,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426173907] [2020-10-14 05:17:39,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:17:39,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:39,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:17:39,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:17:39,367 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 12 states. [2020-10-14 05:17:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:39,832 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-10-14 05:17:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:17:39,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-14 05:17:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:39,834 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:17:39,834 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:17:39,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:17:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:17:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-14 05:17:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:17:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-14 05:17:39,843 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 39 [2020-10-14 05:17:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:39,843 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-14 05:17:39,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:17:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-14 05:17:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 05:17:39,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:39,845 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:39,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:17:39,845 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1024633923, now seen corresponding path program 2 times [2020-10-14 05:17:39,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:39,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840675853] [2020-10-14 05:17:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:39,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:44,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:44,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:17:44,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:44,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 05:17:44,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:45,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:45,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:45,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:45,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:45,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:45,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:45,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:45,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:45,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:45,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:45,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:45,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-14 05:17:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:45,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:45,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:17:45,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:45,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:45,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:45,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:45,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:45,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:17:45,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:17:45,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840675853] [2020-10-14 05:17:45,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:45,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:17:45,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124700543] [2020-10-14 05:17:45,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:17:45,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:17:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:17:45,068 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 13 states. [2020-10-14 05:17:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:45,678 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2020-10-14 05:17:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:17:45,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-14 05:17:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:45,680 INFO L225 Difference]: With dead ends: 153 [2020-10-14 05:17:45,680 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:17:45,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:17:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:17:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-14 05:17:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:17:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-14 05:17:45,698 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 41 [2020-10-14 05:17:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:45,699 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-14 05:17:45,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:17:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-14 05:17:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:17:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:45,700 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:45,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:17:45,700 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -492327397, now seen corresponding path program 3 times [2020-10-14 05:17:45,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:45,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535353531] [2020-10-14 05:17:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:50,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:50,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:17:50,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:50,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:17:50,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:50,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:50,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:50,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:50,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:50,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:50,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:50,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:50,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:50,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:50,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:50,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:50,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:17:50,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-14 05:17:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:50,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:50,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:17:50,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:50,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:50,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:50,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:17:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:50,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:17:50,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535353531] [2020-10-14 05:17:50,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:50,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:17:50,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178629458] [2020-10-14 05:17:50,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:17:50,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:50,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:17:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:17:50,940 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 14 states. [2020-10-14 05:17:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:51,580 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2020-10-14 05:17:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:17:51,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-14 05:17:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:51,582 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:17:51,583 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:17:51,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:17:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:17:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2020-10-14 05:17:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:17:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2020-10-14 05:17:51,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 43 [2020-10-14 05:17:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:51,592 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2020-10-14 05:17:51,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:17:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2020-10-14 05:17:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:17:51,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:51,593 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:51,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:17:51,593 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:51,594 INFO L82 PathProgramCache]: Analyzing trace with hash -46864135, now seen corresponding path program 4 times [2020-10-14 05:17:51,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:51,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985911987] [2020-10-14 05:17:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:56,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:56,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:17:56,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:17:56,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:17:56,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:56,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:17:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:17:56,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:57,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:57,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:57,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:57,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:57,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 05:17:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:57,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:57,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:17:57,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:57,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:17:57,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:57,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:17:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:17:57,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-14 05:17:57,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985911987] [2020-10-14 05:17:57,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:57,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:17:57,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829591128] [2020-10-14 05:17:57,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:17:57,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:17:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:17:57,096 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 12 states. [2020-10-14 05:17:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:17:57,679 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-14 05:17:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:17:57,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-14 05:17:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:17:57,685 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:17:57,685 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:17:57,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:17:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:17:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-14 05:17:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 05:17:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-10-14 05:17:57,710 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 45 [2020-10-14 05:17:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:17:57,716 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-10-14 05:17:57,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:17:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-10-14 05:17:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:17:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:17:57,718 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:17:57,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:17:57,718 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:17:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:17:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 56944285, now seen corresponding path program 1 times [2020-10-14 05:17:57,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:17:57,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122253155] [2020-10-14 05:17:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:17:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:57,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:59,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:02,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:18:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:18:02,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:02,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:02,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:02,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:02,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:02,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:02,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:02,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:02,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:02,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-14 05:18:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:02,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:02,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:02,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:02,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 05:18:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:03,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:03,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:03,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:18:03,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122253155] [2020-10-14 05:18:03,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:03,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:18:03,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280848589] [2020-10-14 05:18:03,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:18:03,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:03,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:18:03,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:18:03,008 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 15 states. [2020-10-14 05:18:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:03,793 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2020-10-14 05:18:03,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:18:03,794 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-10-14 05:18:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:03,795 INFO L225 Difference]: With dead ends: 185 [2020-10-14 05:18:03,795 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 05:18:03,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:18:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 05:18:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-14 05:18:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 05:18:03,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-14 05:18:03,805 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 54 [2020-10-14 05:18:03,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:03,805 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-14 05:18:03,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:18:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-14 05:18:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:18:03,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:03,806 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:03,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:18:03,807 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1438853889, now seen corresponding path program 2 times [2020-10-14 05:18:03,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:03,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029788548] [2020-10-14 05:18:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:03,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:08,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:08,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:18:08,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:08,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:18:08,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:09,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:09,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:09,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:09,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-14 05:18:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:09,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:09,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:09,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:09,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:09,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:09,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:09,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:09,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 05:18:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:09,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:09,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:09,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:09,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:09,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:09,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:09,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:09,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:09,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:09,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:18:09,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029788548] [2020-10-14 05:18:09,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:09,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:18:09,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015621913] [2020-10-14 05:18:09,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:18:09,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:18:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:18:09,085 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 16 states. [2020-10-14 05:18:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:12,050 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2020-10-14 05:18:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:18:12,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-14 05:18:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:12,058 INFO L225 Difference]: With dead ends: 197 [2020-10-14 05:18:12,058 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:18:12,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:18:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:18:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2020-10-14 05:18:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 05:18:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2020-10-14 05:18:12,067 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 56 [2020-10-14 05:18:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:12,068 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2020-10-14 05:18:12,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:18:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2020-10-14 05:18:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:18:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:12,069 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:12,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:18:12,069 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash -86854943, now seen corresponding path program 3 times [2020-10-14 05:18:12,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:12,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532981833] [2020-10-14 05:18:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:12,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:12,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:17,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:18:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:18:17,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:19,445 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 5 [2020-10-14 05:18:19,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:19,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:19,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:19,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:19,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:19,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 05:18:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:19,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:19,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:19,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:19,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:18:19,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:19,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 05:18:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:19,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:18:19,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:19,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:18:19,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-10-14 05:18:19,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532981833] [2020-10-14 05:18:19,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:19,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:18:19,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740331755] [2020-10-14 05:18:19,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:18:19,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:18:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:18:19,791 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 13 states. [2020-10-14 05:18:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:20,268 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2020-10-14 05:18:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:18:20,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-14 05:18:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:20,270 INFO L225 Difference]: With dead ends: 118 [2020-10-14 05:18:20,270 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 05:18:20,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:18:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 05:18:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-14 05:18:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 05:18:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2020-10-14 05:18:20,279 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 58 [2020-10-14 05:18:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:20,279 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2020-10-14 05:18:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:18:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2020-10-14 05:18:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 05:18:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:20,280 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:20,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:18:20,281 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1257469689, now seen corresponding path program 4 times [2020-10-14 05:18:20,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:20,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21124778] [2020-10-14 05:18:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:21,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:25,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:18:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:25,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:25,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:25,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:25,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:25,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-14 05:18:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:25,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:25,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:25,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:25,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:25,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:25,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:25,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-14 05:18:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:25,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:25,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:25,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:25,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:25,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:25,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:25,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:25,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:25,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-14 05:18:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:25,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:25,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:25,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:25,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:25,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:25,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:18:25,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21124778] [2020-10-14 05:18:25,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:25,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:18:25,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355167560] [2020-10-14 05:18:25,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:18:25,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:18:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:18:25,607 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 17 states. [2020-10-14 05:18:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:26,644 INFO L93 Difference]: Finished difference Result 217 states and 245 transitions. [2020-10-14 05:18:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:18:26,644 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-10-14 05:18:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:26,645 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:18:26,646 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:18:26,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:18:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:18:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2020-10-14 05:18:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:18:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2020-10-14 05:18:26,666 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 67 [2020-10-14 05:18:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:26,667 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2020-10-14 05:18:26,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:18:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2020-10-14 05:18:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 05:18:26,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:26,668 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:26,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:18:26,668 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1641379799, now seen corresponding path program 5 times [2020-10-14 05:18:26,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:26,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050418611] [2020-10-14 05:18:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:26,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:31,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:18:31,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:31,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:18:31,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:32,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:32,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:32,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-14 05:18:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:32,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:32,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:32,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:32,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:32,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:32,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:32,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:32,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:32,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 05:18:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:32,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:32,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:32,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:32,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:32,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:32,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-14 05:18:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:32,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:32,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:32,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 6 proven. 196 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:18:32,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050418611] [2020-10-14 05:18:32,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:32,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:18:32,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667407721] [2020-10-14 05:18:32,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:18:32,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:32,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:18:32,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:18:32,043 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand 18 states. [2020-10-14 05:18:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:33,281 INFO L93 Difference]: Finished difference Result 229 states and 259 transitions. [2020-10-14 05:18:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:18:33,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-14 05:18:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:33,284 INFO L225 Difference]: With dead ends: 229 [2020-10-14 05:18:33,284 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:18:33,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:18:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:18:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 130. [2020-10-14 05:18:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 05:18:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2020-10-14 05:18:33,313 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 69 [2020-10-14 05:18:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:33,314 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2020-10-14 05:18:33,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:18:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2020-10-14 05:18:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:18:33,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:33,321 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:33,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:18:33,321 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1211808053, now seen corresponding path program 6 times [2020-10-14 05:18:33,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:33,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657652998] [2020-10-14 05:18:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:33,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:34,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:38,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:38,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:18:38,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:38,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:38,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:38,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:38,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:38,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:38,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:38,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-14 05:18:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:38,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:38,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:38,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:38,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:38,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:38,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:38,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:38,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:38,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:38,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:38,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:38,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-14 05:18:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:38,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:38,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:38,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:38,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:38,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:38,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:38,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:38,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-14 05:18:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:38,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:38,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:38,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:38,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:38,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:18:38,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:38,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:38,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:38,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:38,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 6 proven. 225 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:18:38,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657652998] [2020-10-14 05:18:38,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:38,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:18:38,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767359885] [2020-10-14 05:18:38,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:18:38,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:18:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:18:38,848 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand 19 states. [2020-10-14 05:18:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:40,455 INFO L93 Difference]: Finished difference Result 241 states and 273 transitions. [2020-10-14 05:18:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:18:40,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-14 05:18:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:40,458 INFO L225 Difference]: With dead ends: 241 [2020-10-14 05:18:40,458 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 05:18:40,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:18:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 05:18:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2020-10-14 05:18:40,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 05:18:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-10-14 05:18:40,478 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 71 [2020-10-14 05:18:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:40,479 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-10-14 05:18:40,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:18:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-10-14 05:18:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 05:18:40,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:40,480 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:40,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:18:40,480 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 710220563, now seen corresponding path program 7 times [2020-10-14 05:18:40,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:40,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774068218] [2020-10-14 05:18:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:45,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:45,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 05:18:45,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:18:45,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:46,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:46,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:46,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:46,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-14 05:18:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:46,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:18:46,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:46,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:18:46,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:46,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 05:18:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:46,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:46,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:46,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:18:46,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:46,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:18:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:18:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:46,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-14 05:18:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:46,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:46,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:46,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:46,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:18:46,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:46,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:46,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:18:46,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:46,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:18:46,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 6 proven. 190 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 05:18:46,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774068218] [2020-10-14 05:18:46,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:46,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:18:46,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782203315] [2020-10-14 05:18:46,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:18:46,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:46,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:18:46,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:18:46,697 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 16 states. [2020-10-14 05:18:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:47,427 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2020-10-14 05:18:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:18:47,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-14 05:18:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:47,431 INFO L225 Difference]: With dead ends: 143 [2020-10-14 05:18:47,431 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:18:47,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:18:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:18:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-14 05:18:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:18:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2020-10-14 05:18:47,444 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 73 [2020-10-14 05:18:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:47,445 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2020-10-14 05:18:47,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:18:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2020-10-14 05:18:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:18:47,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:47,446 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:47,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:18:47,446 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1043172925, now seen corresponding path program 8 times [2020-10-14 05:18:47,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:47,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106349365] [2020-10-14 05:18:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:47,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:48,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5100 [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:52,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:18:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:18:52,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:18:52,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:53,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:18:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:53,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:53,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:53,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:18:53,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:53,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:53,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:18:53,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-14 05:18:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:53,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:53,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:53,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:53,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:53,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:53,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:53,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:53,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:53,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:53,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 05:18:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:53,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:53,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:53,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:53,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:53,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:18:53,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:53,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:53,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:53,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:53,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-14 05:18:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:53,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:53,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:53,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:53,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:53,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:53,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:53,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:53,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-14 05:18:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:53,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:18:53,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:18:53,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:18:53,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:18:53,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:18:53,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:18:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:18:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:18:53,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:18:53,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:18:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 8 proven. 256 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:18:53,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106349365] [2020-10-14 05:18:53,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:18:53,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:18:53,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525786446] [2020-10-14 05:18:53,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:18:53,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:18:53,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:18:53,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:18:53,061 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand 20 states. [2020-10-14 05:18:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:18:56,560 INFO L93 Difference]: Finished difference Result 261 states and 293 transitions. [2020-10-14 05:18:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:18:56,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-10-14 05:18:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:18:56,563 INFO L225 Difference]: With dead ends: 261 [2020-10-14 05:18:56,563 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 05:18:56,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:18:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 05:18:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-10-14 05:18:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 05:18:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2020-10-14 05:18:56,577 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 82 [2020-10-14 05:18:56,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:18:56,577 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2020-10-14 05:18:56,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:18:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2020-10-14 05:18:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:18:56,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:18:56,578 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:18:56,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:18:56,578 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:18:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:18:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1731123493, now seen corresponding path program 9 times [2020-10-14 05:18:56,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:18:56,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118124447] [2020-10-14 05:18:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:18:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:18:56,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:18:58,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:01,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:19:01,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:19:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:19:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:02,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:02,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:19:02,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:02,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-14 05:19:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:02,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:02,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:02,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:02,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 05:19:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:02,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:02,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:02,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:02,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:02,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:02,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:02,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:19:02,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:02,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-14 05:19:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:02,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:02,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:19:02,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:02,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 05:19:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:02,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:02,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:02,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 05:19:02,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:19:02,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:19:02,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:02,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:19:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 05:19:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:19:02,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:19:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 8 proven. 289 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:19:02,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118124447] [2020-10-14 05:19:02,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:19:02,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:19:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111037566] [2020-10-14 05:19:02,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:19:02,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:19:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:19:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:19:02,059 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand 21 states. [2020-10-14 05:19:03,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:19:03,705 INFO L93 Difference]: Finished difference Result 273 states and 307 transitions. [2020-10-14 05:19:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:19:03,706 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-14 05:19:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:19:03,707 INFO L225 Difference]: With dead ends: 273 [2020-10-14 05:19:03,708 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 05:19:03,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:19:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 05:19:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-10-14 05:19:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 05:19:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2020-10-14 05:19:03,721 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 84 [2020-10-14 05:19:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:19:03,721 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2020-10-14 05:19:03,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:19:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2020-10-14 05:19:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:19:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:19:03,722 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:19:03,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:19:03,723 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:19:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:19:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash 655290375, now seen corresponding path program 10 times [2020-10-14 05:19:03,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:19:03,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084575685] [2020-10-14 05:19:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:19:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:19:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:19:08,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:19:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:19:08,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 05:19:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0