/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:53:31,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:53:31,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:53:31,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:53:31,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:53:31,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:53:31,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:53:31,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:53:31,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:53:31,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:53:31,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:53:31,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:53:31,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:53:31,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:53:31,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:53:31,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:53:31,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:53:31,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:53:31,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:53:31,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:53:31,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:53:31,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:53:31,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:53:31,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:53:31,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:53:31,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:53:31,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:53:31,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:53:31,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:53:31,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:53:31,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:53:31,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:53:31,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:53:31,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:53:31,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:53:31,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:53:31,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:53:31,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:53:31,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:53:31,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:53:31,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:53:31,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:53:32,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:53:32,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:53:32,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:53:32,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:53:32,008 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:53:32,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:53:32,009 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:53:32,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:53:32,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:53:32,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:53:32,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:53:32,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:53:32,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:53:32,011 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:53:32,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:53:32,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:53:32,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:53:32,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:53:32,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:53:32,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:53:32,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:53:32,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:53:32,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:53:32,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:53:32,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:53:32,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:53:32,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:53:32,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:53:32,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:53:32,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:53:32,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:53:32,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:53:32,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:53:32,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:53:32,322 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:53:32,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-13 04:53:32,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f515eb71/aa395b2f6ef046e0b8acb71385796027/FLAG29dcbb9dc [2020-10-13 04:53:32,839 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:53:32,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2020-10-13 04:53:32,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f515eb71/aa395b2f6ef046e0b8acb71385796027/FLAG29dcbb9dc [2020-10-13 04:53:33,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f515eb71/aa395b2f6ef046e0b8acb71385796027 [2020-10-13 04:53:33,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:53:33,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:53:33,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:53:33,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:53:33,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:53:33,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20374217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33, skipping insertion in model container [2020-10-13 04:53:33,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:53:33,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:53:33,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:53:33,513 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:53:33,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:53:33,569 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:53:33,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33 WrapperNode [2020-10-13 04:53:33,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:53:33,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:53:33,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:53:33,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:53:33,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... [2020-10-13 04:53:33,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:53:33,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:53:33,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:53:33,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:53:33,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:53:33,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:53:33,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:53:33,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:53:33,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:53:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:53:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:53:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:53:33,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:53:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:53:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:53:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:53:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:53:33,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:53:33,997 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:53:33,998 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:53:34,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:53:34 BoogieIcfgContainer [2020-10-13 04:53:34,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:53:34,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:53:34,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:53:34,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:53:34,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:53:33" (1/3) ... [2020-10-13 04:53:34,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bbe807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:53:34, skipping insertion in model container [2020-10-13 04:53:34,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:53:33" (2/3) ... [2020-10-13 04:53:34,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57bbe807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:53:34, skipping insertion in model container [2020-10-13 04:53:34,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:53:34" (3/3) ... [2020-10-13 04:53:34,010 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2020-10-13 04:53:34,021 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:53:34,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:53:34,043 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:53:34,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:53:34,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:53:34,063 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:53:34,063 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:53:34,063 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:53:34,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:53:34,063 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:53:34,063 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:53:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 04:53:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:53:34,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:34,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:34,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614638, now seen corresponding path program 1 times [2020-10-13 04:53:34,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:34,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058395073] [2020-10-13 04:53:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:34,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:53:34,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:53:34,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-13 04:53:34,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:53:34,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:34,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:53:34,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:34,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:34,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:34,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:34,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:53:34,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:34,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:34,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:34,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058395073] [2020-10-13 04:53:34,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:53:34,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:53:34,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736787041] [2020-10-13 04:53:34,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:53:34,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:53:34,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:53:34,900 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 04:53:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:35,012 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-10-13 04:53:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:53:35,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 04:53:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:35,023 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:53:35,023 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:53:35,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:53:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:53:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 04:53:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:53:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 04:53:35,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-10-13 04:53:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:35,088 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 04:53:35,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:53:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 04:53:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:53:35,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:35,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:35,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:53:35,093 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash -395002610, now seen corresponding path program 1 times [2020-10-13 04:53:35,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:35,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683549227] [2020-10-13 04:53:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:35,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:35,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:53:35,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:53:35,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-13 04:53:35,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:53:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:35,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:53:35,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:35,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:35,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:35,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:35,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:53:35,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:35,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:35,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:35,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:35,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:53:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:53:35,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683549227] [2020-10-13 04:53:35,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:53:35,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:53:35,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987100074] [2020-10-13 04:53:35,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:53:35,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:35,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:53:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:53:35,563 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-13 04:53:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:35,687 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-13 04:53:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:53:35,688 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 04:53:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:35,689 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:53:35,689 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:53:35,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:53:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:53:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:53:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:53:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 04:53:35,706 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-13 04:53:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:35,706 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 04:53:35,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:53:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 04:53:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:53:35,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:35,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:35,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:53:35,709 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 47445068, now seen corresponding path program 1 times [2020-10-13 04:53:35,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:35,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584512385] [2020-10-13 04:53:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:37,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:37,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:53:37,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:53:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1979 [2020-10-13 04:53:37,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:53:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:53:37,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:53:37,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:37,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:37,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:37,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:37,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:37,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:37,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:53:37,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:37,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:37,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:37,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:37,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 04:53:37,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584512385] [2020-10-13 04:53:37,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:37,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:53:37,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961347847] [2020-10-13 04:53:37,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:53:37,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:53:37,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:53:37,759 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-13 04:53:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:37,889 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-10-13 04:53:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:53:37,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:53:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:37,890 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:53:37,891 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:53:37,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:53:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:53:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:53:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:53:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:53:37,906 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2020-10-13 04:53:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:37,907 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:53:37,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:53:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:53:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:53:37,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:37,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:37,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:53:37,909 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:37,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1810840398, now seen corresponding path program 2 times [2020-10-13 04:53:37,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:37,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641910200] [2020-10-13 04:53:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:37,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:37,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:42,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:42,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:53:42,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:53:42,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:53:42,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:53:42,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:53:42,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:53:42,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:42,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:42,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:42,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:42,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:42,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:42,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:53:42,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:42,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:42,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:42,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:53:42,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641910200] [2020-10-13 04:53:42,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:42,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:53:42,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520832045] [2020-10-13 04:53:42,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:53:42,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:53:42,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:53:42,979 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 04:53:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:43,073 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-13 04:53:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:53:43,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:53:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:43,075 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:53:43,075 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 04:53:43,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:53:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 04:53:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-13 04:53:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:53:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 04:53:43,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2020-10-13 04:53:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:43,083 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 04:53:43,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:53:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 04:53:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 04:53:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:43,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:43,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:53:43,085 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:43,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:43,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1527698548, now seen corresponding path program 3 times [2020-10-13 04:53:43,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:43,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418928990] [2020-10-13 04:53:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:43,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:43,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:43,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:47,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:48,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 04:53:48,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:53:48,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:53:48,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:53:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:48,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:53:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:48,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:48,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:48,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:48,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:48,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:48,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 04:53:48,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418928990] [2020-10-13 04:53:48,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:48,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:53:48,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553910029] [2020-10-13 04:53:48,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:53:48,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:53:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:53:48,153 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-10-13 04:53:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:48,264 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 04:53:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:53:48,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 04:53:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:48,266 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:53:48,266 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:53:48,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:53:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:53:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:53:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:53:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:53:48,274 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2020-10-13 04:53:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:48,275 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:53:48,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:53:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:53:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:53:48,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:48,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:48,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:53:48,277 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1451349618, now seen corresponding path program 4 times [2020-10-13 04:53:48,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:48,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224990746] [2020-10-13 04:53:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:53,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:53:53,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:53:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:53:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:53:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:53:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:53:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:53:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:53,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:53,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:53,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:53,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 04:53:53,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224990746] [2020-10-13 04:53:53,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:53,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:53:53,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914401374] [2020-10-13 04:53:53,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:53:53,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:53:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:53:53,379 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-10-13 04:53:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:53,521 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-13 04:53:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:53:53,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 04:53:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:53,523 INFO L225 Difference]: With dead ends: 73 [2020-10-13 04:53:53,523 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:53:53,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:53:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:53:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 04:53:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 04:53:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 04:53:53,539 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2020-10-13 04:53:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:53,539 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 04:53:53,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:53:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 04:53:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:53:53,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:53,544 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:53,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:53:53,545 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:53,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2058629836, now seen corresponding path program 5 times [2020-10-13 04:53:53,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:53,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395393025] [2020-10-13 04:53:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:53,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:58,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:53:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:53:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:53:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:53:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:58,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:53:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:58,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:58,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:58,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:58,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:58,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:58,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:58,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 04:53:58,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395393025] [2020-10-13 04:53:58,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:58,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:53:58,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012118215] [2020-10-13 04:53:58,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:53:58,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:58,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:53:58,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:53:58,656 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-13 04:53:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:58,772 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2020-10-13 04:53:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:53:58,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 04:53:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:58,773 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:53:58,773 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 04:53:58,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:53:58,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 04:53:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-13 04:53:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:53:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 04:53:58,781 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2020-10-13 04:53:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:58,781 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 04:53:58,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:53:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 04:53:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:53:58,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:58,783 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:58,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:53:58,783 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1129940942, now seen corresponding path program 6 times [2020-10-13 04:53:58,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:58,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115754285] [2020-10-13 04:53:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:03,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:54:03,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:03,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:54:03,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:54:03,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:03,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:03,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:03,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:03,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:54:03,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115754285] [2020-10-13 04:54:03,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:03,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:03,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215468577] [2020-10-13 04:54:03,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:03,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:03,881 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-13 04:54:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:04,015 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-13 04:54:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:04,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 04:54:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:04,017 INFO L225 Difference]: With dead ends: 87 [2020-10-13 04:54:04,017 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:54:04,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:54:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:54:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:54:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-13 04:54:04,023 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2020-10-13 04:54:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:04,024 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-13 04:54:04,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-13 04:54:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:54:04,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:04,025 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:04,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:54:04,025 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2092627444, now seen corresponding path program 7 times [2020-10-13 04:54:04,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:04,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296084873] [2020-10-13 04:54:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:04,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:04,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:09,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:54:09,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:09,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:54:09,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:09,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:54:09,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 04:54:09,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:54:09,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:09,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:09,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:09,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:09,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:09,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:09,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 04:54:09,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296084873] [2020-10-13 04:54:09,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:09,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:54:09,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97960937] [2020-10-13 04:54:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:54:09,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:54:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:09,174 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 11 states. [2020-10-13 04:54:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:09,332 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-13 04:54:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:54:09,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:54:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:09,333 INFO L225 Difference]: With dead ends: 94 [2020-10-13 04:54:09,333 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 04:54:09,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 04:54:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 04:54:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:54:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 04:54:09,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2020-10-13 04:54:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:09,340 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 04:54:09,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:54:09,340 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 04:54:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:54:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:09,341 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:09,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:54:09,342 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2092520974, now seen corresponding path program 8 times [2020-10-13 04:54:09,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:09,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221791287] [2020-10-13 04:54:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:14,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:54:14,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:54:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:14,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:14,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:14,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:14,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:14,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:14,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:14,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:14,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 04:54:14,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221791287] [2020-10-13 04:54:14,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:14,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:54:14,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815760896] [2020-10-13 04:54:14,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:54:14,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:54:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:14,491 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 12 states. [2020-10-13 04:54:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:14,662 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-13 04:54:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:54:14,662 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 04:54:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:14,663 INFO L225 Difference]: With dead ends: 101 [2020-10-13 04:54:14,663 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:54:14,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:54:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 04:54:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 04:54:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 04:54:14,680 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2020-10-13 04:54:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:14,680 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 04:54:14,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:54:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 04:54:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 04:54:14,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:14,682 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:14,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:54:14,683 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1825288524, now seen corresponding path program 9 times [2020-10-13 04:54:14,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:14,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919907552] [2020-10-13 04:54:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:14,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:14,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:19,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:19,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 04:54:19,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:54:19,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:19,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:19,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:19,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:19,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:19,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:19,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:19,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-13 04:54:19,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919907552] [2020-10-13 04:54:19,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:19,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:54:19,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054476075] [2020-10-13 04:54:19,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:54:19,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:54:19,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:54:19,830 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 13 states. [2020-10-13 04:54:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:20,017 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-13 04:54:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:54:20,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-13 04:54:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:20,019 INFO L225 Difference]: With dead ends: 108 [2020-10-13 04:54:20,019 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:54:20,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:54:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:54:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 04:54:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:54:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 04:54:20,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2020-10-13 04:54:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:20,030 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 04:54:20,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:54:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 04:54:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:54:20,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:20,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:20,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:54:20,032 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1177185202, now seen corresponding path program 10 times [2020-10-13 04:54:20,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:20,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141166014] [2020-10-13 04:54:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:20,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:54:25,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:54:25,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:25,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:25,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:25,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:25,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:25,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-10-13 04:54:25,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141166014] [2020-10-13 04:54:25,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:25,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:54:25,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154707492] [2020-10-13 04:54:25,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:54:25,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:25,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:54:25,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:54:25,207 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 14 states. [2020-10-13 04:54:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:25,403 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-13 04:54:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:54:25,408 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 04:54:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:25,409 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:54:25,409 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 04:54:25,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:54:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 04:54:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-13 04:54:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:54:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-13 04:54:25,416 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2020-10-13 04:54:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:25,417 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-13 04:54:25,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:54:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-13 04:54:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 04:54:25,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:25,418 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:25,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:54:25,418 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 342894732, now seen corresponding path program 11 times [2020-10-13 04:54:25,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:25,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094884343] [2020-10-13 04:54:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:25,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 04:54:30,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:30,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:54:30,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:54:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 04:54:30,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:54:30,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:30,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:30,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-13 04:54:30,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094884343] [2020-10-13 04:54:30,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:30,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:54:30,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114193163] [2020-10-13 04:54:30,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:54:30,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:54:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:54:30,593 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-10-13 04:54:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:30,807 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2020-10-13 04:54:30,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:54:30,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-13 04:54:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:30,809 INFO L225 Difference]: With dead ends: 122 [2020-10-13 04:54:30,809 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:54:30,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:54:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:54:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-13 04:54:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:54:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 04:54:30,818 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2020-10-13 04:54:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:30,818 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 04:54:30,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:54:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 04:54:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:54:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:30,819 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:30,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:54:30,820 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:30,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:30,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1686898, now seen corresponding path program 12 times [2020-10-13 04:54:30,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:30,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526055936] [2020-10-13 04:54:30,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:30,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:30,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:35,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:35,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:54:35,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:35,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:54:35,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:54:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:54:35,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:54:35,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:36,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:36,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:36,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-13 04:54:36,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526055936] [2020-10-13 04:54:36,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:36,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:54:36,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650743537] [2020-10-13 04:54:36,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:54:36,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:54:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:54:36,025 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 16 states. [2020-10-13 04:54:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:36,244 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2020-10-13 04:54:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:54:36,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 04:54:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:36,246 INFO L225 Difference]: With dead ends: 129 [2020-10-13 04:54:36,246 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:54:36,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:54:36,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:54:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 04:54:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:54:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-13 04:54:36,254 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2020-10-13 04:54:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:36,254 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-13 04:54:36,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:54:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-13 04:54:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:54:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:36,256 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:36,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:54:36,256 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash 106590156, now seen corresponding path program 13 times [2020-10-13 04:54:36,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:36,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659944792] [2020-10-13 04:54:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:41,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:54:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:41,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:41,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:41,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:41,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:54:41,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:41,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:41,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:41,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:41,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-10-13 04:54:41,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659944792] [2020-10-13 04:54:41,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:41,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:54:41,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418516993] [2020-10-13 04:54:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:54:41,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:54:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:54:41,508 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 17 states. [2020-10-13 04:54:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:41,771 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-10-13 04:54:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:54:41,772 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 04:54:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:41,773 INFO L225 Difference]: With dead ends: 136 [2020-10-13 04:54:41,773 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:54:41,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:54:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:54:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-13 04:54:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:54:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-13 04:54:41,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2020-10-13 04:54:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:41,793 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-13 04:54:41,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:54:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-13 04:54:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:54:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:41,798 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:41,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:54:41,799 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:41,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1965252814, now seen corresponding path program 14 times [2020-10-13 04:54:41,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:41,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987347017] [2020-10-13 04:54:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:41,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:41,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:46,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:54:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:46,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:54:46,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:47,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:47,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:47,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:47,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:47,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:47,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-13 04:54:47,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987347017] [2020-10-13 04:54:47,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:47,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:54:47,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398148586] [2020-10-13 04:54:47,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:54:47,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:47,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:54:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:54:47,094 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2020-10-13 04:54:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:47,363 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-10-13 04:54:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:54:47,364 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-13 04:54:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:47,365 INFO L225 Difference]: With dead ends: 143 [2020-10-13 04:54:47,366 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:54:47,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:54:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:54:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-13 04:54:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:54:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 04:54:47,378 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2020-10-13 04:54:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:47,379 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 04:54:47,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:54:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 04:54:47,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 04:54:47,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:47,384 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:47,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:54:47,385 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:47,385 INFO L82 PathProgramCache]: Analyzing trace with hash -38631668, now seen corresponding path program 15 times [2020-10-13 04:54:47,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:47,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629776924] [2020-10-13 04:54:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:50,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:52,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:54:52,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:52,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:52,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:52,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:52,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-13 04:54:52,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629776924] [2020-10-13 04:54:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:52,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:54:52,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814746741] [2020-10-13 04:54:52,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:54:52,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:52,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:54:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:54:52,649 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 19 states. [2020-10-13 04:54:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:52,925 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2020-10-13 04:54:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:54:52,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-10-13 04:54:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:52,926 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:54:52,926 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:54:52,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:54:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:54:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:54:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:54:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-13 04:54:52,940 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2020-10-13 04:54:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:52,941 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-13 04:54:52,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:54:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-13 04:54:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:54:52,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:52,942 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:52,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:54:52,942 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash -523964658, now seen corresponding path program 16 times [2020-10-13 04:54:52,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:52,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066566844] [2020-10-13 04:54:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:57,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:57,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:54:57,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:54:57,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:58,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:58,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:58,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:58,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:58,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:58,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:58,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:58,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:58,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-13 04:54:58,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066566844] [2020-10-13 04:54:58,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:58,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:54:58,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950472166] [2020-10-13 04:54:58,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:54:58,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:54:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:54:58,214 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 20 states. [2020-10-13 04:54:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:58,453 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2020-10-13 04:54:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:54:58,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 04:54:58,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:58,455 INFO L225 Difference]: With dead ends: 157 [2020-10-13 04:54:58,455 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 04:54:58,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:54:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 04:54:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-13 04:54:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:54:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-10-13 04:54:58,464 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 83 [2020-10-13 04:54:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:58,465 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-10-13 04:54:58,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:54:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-10-13 04:54:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:54:58,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:58,466 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:58,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:54:58,466 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1688235596, now seen corresponding path program 17 times [2020-10-13 04:54:58,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:58,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339502364] [2020-10-13 04:54:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:03,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:55:03,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:03,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:55:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:55:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:55:03,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:03,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:03,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:03,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:03,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:03,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2020-10-13 04:55:03,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339502364] [2020-10-13 04:55:03,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:03,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:55:03,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449864704] [2020-10-13 04:55:03,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:55:03,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:55:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:55:03,768 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 21 states. [2020-10-13 04:55:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:04,026 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2020-10-13 04:55:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:55:04,026 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-13 04:55:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:04,028 INFO L225 Difference]: With dead ends: 164 [2020-10-13 04:55:04,028 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:55:04,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:55:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:55:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-13 04:55:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:55:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-13 04:55:04,034 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 87 [2020-10-13 04:55:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:04,034 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-13 04:55:04,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:55:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-13 04:55:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:55:04,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:04,035 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:04,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:55:04,036 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash 721612110, now seen corresponding path program 18 times [2020-10-13 04:55:04,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:04,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306011] [2020-10-13 04:55:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:04,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:09,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:55:09,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:09,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:55:09,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:09,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:55:09,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:55:09,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:55:09,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:09,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:09,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:09,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2020-10-13 04:55:09,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306011] [2020-10-13 04:55:09,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:09,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:55:09,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969044816] [2020-10-13 04:55:09,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:55:09,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:55:09,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:55:09,350 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 22 states. [2020-10-13 04:55:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:09,621 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2020-10-13 04:55:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:55:09,621 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-10-13 04:55:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:09,622 INFO L225 Difference]: With dead ends: 171 [2020-10-13 04:55:09,622 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:55:09,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:55:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:55:09,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 04:55:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:55:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-13 04:55:09,628 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2020-10-13 04:55:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:09,628 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-13 04:55:09,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:55:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-13 04:55:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:55:09,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:09,629 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:09,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:55:09,629 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash -733207156, now seen corresponding path program 19 times [2020-10-13 04:55:09,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:09,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792523027] [2020-10-13 04:55:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:09,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:14,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:55:14,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:14,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:14,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:55:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:55:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:55:14,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:14,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:14,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:14,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:14,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:14,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:14,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:14,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:14,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-13 04:55:14,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792523027] [2020-10-13 04:55:14,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:14,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:55:14,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208114912] [2020-10-13 04:55:14,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:55:14,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:14,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:55:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:55:14,983 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 23 states. [2020-10-13 04:55:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:15,276 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2020-10-13 04:55:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:55:15,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-13 04:55:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:15,278 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:55:15,279 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:55:15,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:55:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:55:15,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-13 04:55:15,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:55:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 04:55:15,286 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2020-10-13 04:55:15,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:15,287 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 04:55:15,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:55:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 04:55:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:55:15,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:15,288 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:15,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:55:15,288 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -585802866, now seen corresponding path program 20 times [2020-10-13 04:55:15,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:15,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623208949] [2020-10-13 04:55:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:15,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:15,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:15,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:20,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:55:20,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:20,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:20,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:20,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:55:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:20,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:55:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:20,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-13 04:55:20,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623208949] [2020-10-13 04:55:20,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:20,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:55:20,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302890711] [2020-10-13 04:55:20,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:55:20,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:55:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:55:20,640 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 24 states. [2020-10-13 04:55:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:20,917 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-10-13 04:55:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:55:20,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-10-13 04:55:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:20,922 INFO L225 Difference]: With dead ends: 185 [2020-10-13 04:55:20,922 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 04:55:20,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:55:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 04:55:20,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-13 04:55:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:55:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-10-13 04:55:20,928 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2020-10-13 04:55:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:20,929 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-10-13 04:55:20,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:55:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-10-13 04:55:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 04:55:20,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:20,930 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:20,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:55:20,931 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:20,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1797411636, now seen corresponding path program 21 times [2020-10-13 04:55:20,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:20,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884325232] [2020-10-13 04:55:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:20,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:55:25,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:26,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:26,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:26,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:26,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-10-13 04:55:26,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884325232] [2020-10-13 04:55:26,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:26,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:55:26,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643665596] [2020-10-13 04:55:26,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:55:26,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:55:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:55:26,302 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 25 states. [2020-10-13 04:55:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:26,580 INFO L93 Difference]: Finished difference Result 192 states and 203 transitions. [2020-10-13 04:55:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:55:26,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-10-13 04:55:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:26,582 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:55:26,582 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:55:26,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:55:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:55:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 04:55:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:55:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-13 04:55:26,589 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2020-10-13 04:55:26,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:26,589 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-13 04:55:26,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:55:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-13 04:55:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:55:26,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:26,591 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:26,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:55:26,591 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1590412850, now seen corresponding path program 22 times [2020-10-13 04:55:26,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:26,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463762249] [2020-10-13 04:55:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:31,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:55:31,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:55:31,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:32,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:32,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2020-10-13 04:55:32,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463762249] [2020-10-13 04:55:32,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:32,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:55:32,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721764166] [2020-10-13 04:55:32,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:55:32,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:55:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:55:32,015 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 26 states. [2020-10-13 04:55:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:32,256 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2020-10-13 04:55:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:55:32,256 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-13 04:55:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:32,257 INFO L225 Difference]: With dead ends: 199 [2020-10-13 04:55:32,257 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 04:55:32,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:55:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 04:55:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-13 04:55:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:55:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-10-13 04:55:32,265 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 107 [2020-10-13 04:55:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:32,265 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-10-13 04:55:32,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:55:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-10-13 04:55:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:55:32,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:32,267 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:32,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:55:32,270 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash 494732300, now seen corresponding path program 23 times [2020-10-13 04:55:32,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:32,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673888698] [2020-10-13 04:55:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:32,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:32,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:37,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:55:37,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:37,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:55:37,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:55:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:55:37,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:55:37,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:37,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:37,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:37,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:37,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2020-10-13 04:55:37,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673888698] [2020-10-13 04:55:37,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:37,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:55:37,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109523171] [2020-10-13 04:55:37,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:55:37,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:55:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:55:37,729 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 27 states. [2020-10-13 04:55:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:38,039 INFO L93 Difference]: Finished difference Result 206 states and 217 transitions. [2020-10-13 04:55:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:55:38,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 111 [2020-10-13 04:55:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:38,041 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:55:38,042 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:55:38,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:55:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:55:38,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-13 04:55:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:55:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-13 04:55:38,049 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2020-10-13 04:55:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:38,049 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-13 04:55:38,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:55:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-13 04:55:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:55:38,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:38,050 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:38,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:55:38,051 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1030256626, now seen corresponding path program 24 times [2020-10-13 04:55:38,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:38,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905800803] [2020-10-13 04:55:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:43,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:55:43,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:43,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:55:43,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:55:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:43,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:55:43,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-13 04:55:43,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905800803] [2020-10-13 04:55:43,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:43,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:55:43,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462972449] [2020-10-13 04:55:43,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:55:43,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:43,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:55:43,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:55:43,539 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 28 states. [2020-10-13 04:55:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:43,912 INFO L93 Difference]: Finished difference Result 213 states and 224 transitions. [2020-10-13 04:55:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:55:43,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 115 [2020-10-13 04:55:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:43,914 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:55:43,914 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:55:43,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:55:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:55:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 04:55:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:55:43,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-13 04:55:43,926 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2020-10-13 04:55:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:43,926 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-13 04:55:43,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:55:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-13 04:55:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:55:43,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:43,927 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:43,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:55:43,927 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1806554292, now seen corresponding path program 25 times [2020-10-13 04:55:43,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:43,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797370238] [2020-10-13 04:55:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:44,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:48,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:55:48,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:48,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:55:48,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:55:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:55:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:55:48,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:49,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:49,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:49,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:49,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:49,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-13 04:55:49,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797370238] [2020-10-13 04:55:49,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:49,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:55:49,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230835977] [2020-10-13 04:55:49,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:55:49,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:55:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:55:49,466 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 29 states. [2020-10-13 04:55:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:49,850 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2020-10-13 04:55:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:55:49,851 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-13 04:55:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:49,852 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:55:49,853 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 04:55:49,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:55:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 04:55:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-13 04:55:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:55:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-13 04:55:49,859 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2020-10-13 04:55:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:49,859 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-13 04:55:49,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:55:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-13 04:55:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:55:49,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:49,861 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:49,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:55:49,861 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1384692146, now seen corresponding path program 26 times [2020-10-13 04:55:49,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:49,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578224078] [2020-10-13 04:55:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:49,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:50,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:54,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:55:54,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:55:54,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:55:54,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:55,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:55,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:55,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:55,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:55,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:55,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:55,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:55,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2020-10-13 04:55:55,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578224078] [2020-10-13 04:55:55,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:55:55,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032030540] [2020-10-13 04:55:55,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:55:55,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:55:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:55:55,428 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 30 states. [2020-10-13 04:55:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:55,819 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2020-10-13 04:55:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:55:55,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 123 [2020-10-13 04:55:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:55,821 INFO L225 Difference]: With dead ends: 227 [2020-10-13 04:55:55,821 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:55:55,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:55:55,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:55:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-13 04:55:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:55:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2020-10-13 04:55:55,828 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 123 [2020-10-13 04:55:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:55,829 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2020-10-13 04:55:55,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:55:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2020-10-13 04:55:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:55:55,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:55,830 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:55,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:55:55,830 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1317347980, now seen corresponding path program 27 times [2020-10-13 04:55:55,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:55,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950130965] [2020-10-13 04:55:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:55,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:55,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:56,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:00,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:00,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 04:56:00,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:56:00,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:56:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:56:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:56:00,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:01,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:01,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:01,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:01,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:01,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-10-13 04:56:01,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950130965] [2020-10-13 04:56:01,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:01,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:56:01,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758508370] [2020-10-13 04:56:01,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:56:01,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:01,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:56:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:56:01,402 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 31 states. [2020-10-13 04:56:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:01,802 INFO L93 Difference]: Finished difference Result 234 states and 245 transitions. [2020-10-13 04:56:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:56:01,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 127 [2020-10-13 04:56:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:01,804 INFO L225 Difference]: With dead ends: 234 [2020-10-13 04:56:01,804 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:56:01,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:56:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:56:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 04:56:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:56:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-13 04:56:01,812 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 127 [2020-10-13 04:56:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:01,812 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-13 04:56:01,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:56:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-13 04:56:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:56:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:01,813 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:01,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:56:01,814 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:01,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:01,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1863021710, now seen corresponding path program 28 times [2020-10-13 04:56:01,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:01,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152491224] [2020-10-13 04:56:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:02,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:06,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:56:06,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:56:06,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:56:06,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:07,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:07,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:07,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:07,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:07,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:07,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:56:07,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:07,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2020-10-13 04:56:07,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152491224] [2020-10-13 04:56:07,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:07,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:56:07,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14884645] [2020-10-13 04:56:07,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:56:07,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:56:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:56:07,518 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2020-10-13 04:56:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:07,922 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2020-10-13 04:56:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:56:07,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-13 04:56:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:07,924 INFO L225 Difference]: With dead ends: 241 [2020-10-13 04:56:07,924 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:56:07,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:56:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:56:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-13 04:56:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:56:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2020-10-13 04:56:07,936 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 131 [2020-10-13 04:56:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:07,937 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2020-10-13 04:56:07,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:56:07,937 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2020-10-13 04:56:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 04:56:07,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:07,946 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:07,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:56:07,948 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1346234828, now seen corresponding path program 29 times [2020-10-13 04:56:07,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:07,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173638633] [2020-10-13 04:56:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:08,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:08,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:13,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:13,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 04:56:13,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:13,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:56:13,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:56:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:13,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:56:13,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:13,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:13,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:13,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:13,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:13,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:13,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1305 trivial. 0 not checked. [2020-10-13 04:56:13,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173638633] [2020-10-13 04:56:13,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:13,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:56:13,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284513633] [2020-10-13 04:56:13,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:56:13,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:56:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:56:13,680 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 33 states. [2020-10-13 04:56:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:14,035 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-10-13 04:56:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:56:14,036 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 135 [2020-10-13 04:56:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:14,037 INFO L225 Difference]: With dead ends: 248 [2020-10-13 04:56:14,038 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:56:14,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:56:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:56:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-13 04:56:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:56:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-13 04:56:14,044 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2020-10-13 04:56:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:14,045 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-13 04:56:14,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:56:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-13 04:56:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 04:56:14,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:14,046 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:14,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:56:14,046 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash 898372302, now seen corresponding path program 30 times [2020-10-13 04:56:14,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:14,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366031546] [2020-10-13 04:56:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:14,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:19,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:56:19,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 04:56:19,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:56:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:19,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:19,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:19,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:19,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:19,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:19,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:56:19,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:19,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:19,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:19,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:19,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:56:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-10-13 04:56:19,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366031546] [2020-10-13 04:56:19,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:19,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:56:19,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476330327] [2020-10-13 04:56:19,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:56:19,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:56:19,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:56:19,978 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 34 states. [2020-10-13 04:56:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:20,454 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2020-10-13 04:56:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:56:20,455 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 139 [2020-10-13 04:56:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:20,456 INFO L225 Difference]: With dead ends: 255 [2020-10-13 04:56:20,456 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:56:20,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:56:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:56:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 04:56:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:56:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2020-10-13 04:56:20,464 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 139 [2020-10-13 04:56:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:20,464 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2020-10-13 04:56:20,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:56:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2020-10-13 04:56:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:56:20,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:20,465 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:20,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:56:20,466 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash -861634292, now seen corresponding path program 31 times [2020-10-13 04:56:20,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:20,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929936883] [2020-10-13 04:56:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:20,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:25,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:25,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:56:25,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:25,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:56:25,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:56:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:56:25,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:56:25,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:26,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:26,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:26,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:26,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:26,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:26,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:26,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:26,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:26,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2020-10-13 04:56:26,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929936883] [2020-10-13 04:56:26,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:26,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:56:26,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987157735] [2020-10-13 04:56:26,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:56:26,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:56:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:56:26,200 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 35 states. [2020-10-13 04:56:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:26,565 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2020-10-13 04:56:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:56:26,566 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2020-10-13 04:56:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:26,567 INFO L225 Difference]: With dead ends: 262 [2020-10-13 04:56:26,567 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 04:56:26,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:56:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 04:56:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-13 04:56:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:56:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-13 04:56:26,575 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 143 [2020-10-13 04:56:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:26,576 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-13 04:56:26,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:56:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-13 04:56:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:56:26,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:26,577 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:26,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:56:26,577 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash -802086642, now seen corresponding path program 32 times [2020-10-13 04:56:26,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:26,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466248218] [2020-10-13 04:56:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:26,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:31,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:56:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:56:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:32,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:32,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:32,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:32,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2020-10-13 04:56:32,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466248218] [2020-10-13 04:56:32,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:32,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:56:32,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762662737] [2020-10-13 04:56:32,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:56:32,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:32,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:56:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:56:32,355 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 36 states. [2020-10-13 04:56:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:32,729 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2020-10-13 04:56:32,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:56:32,730 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 147 [2020-10-13 04:56:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:32,731 INFO L225 Difference]: With dead ends: 269 [2020-10-13 04:56:32,731 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 04:56:32,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:56:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 04:56:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-13 04:56:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:56:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2020-10-13 04:56:32,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2020-10-13 04:56:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:32,739 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2020-10-13 04:56:32,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:56:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2020-10-13 04:56:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:56:32,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:32,740 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:32,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:56:32,741 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1511987124, now seen corresponding path program 33 times [2020-10-13 04:56:32,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:32,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213293580] [2020-10-13 04:56:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:37,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:56:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:38,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:38,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:38,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-13 04:56:38,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213293580] [2020-10-13 04:56:38,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:38,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:56:38,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601481193] [2020-10-13 04:56:38,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:56:38,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:56:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:56:38,578 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 37 states. [2020-10-13 04:56:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:38,952 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2020-10-13 04:56:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:56:38,952 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 151 [2020-10-13 04:56:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:38,953 INFO L225 Difference]: With dead ends: 276 [2020-10-13 04:56:38,954 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:56:38,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:56:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:56:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 04:56:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:56:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-13 04:56:38,961 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 151 [2020-10-13 04:56:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:38,961 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-13 04:56:38,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:56:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-13 04:56:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:56:38,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:38,962 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:38,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:56:38,963 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:38,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 791846734, now seen corresponding path program 34 times [2020-10-13 04:56:38,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:38,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726598371] [2020-10-13 04:56:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:39,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:39,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:44,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:44,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:56:44,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:56:44,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:44,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:44,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:44,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:44,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:44,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:56:44,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2020-10-13 04:56:44,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726598371] [2020-10-13 04:56:44,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:44,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:56:44,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075849673] [2020-10-13 04:56:44,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:56:44,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:44,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:56:44,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:56:44,858 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 38 states. [2020-10-13 04:56:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:45,253 INFO L93 Difference]: Finished difference Result 283 states and 294 transitions. [2020-10-13 04:56:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:56:45,253 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 155 [2020-10-13 04:56:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:45,255 INFO L225 Difference]: With dead ends: 283 [2020-10-13 04:56:45,255 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 04:56:45,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:56:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 04:56:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2020-10-13 04:56:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:56:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2020-10-13 04:56:45,263 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2020-10-13 04:56:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:45,264 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2020-10-13 04:56:45,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:56:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2020-10-13 04:56:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 04:56:45,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:45,265 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:45,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:56:45,265 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash -316989556, now seen corresponding path program 35 times [2020-10-13 04:56:45,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:45,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955021482] [2020-10-13 04:56:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:45,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:45,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:50,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:56:50,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 04:56:50,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:56:50,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:51,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-13 04:56:51,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955021482] [2020-10-13 04:56:51,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:51,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:56:51,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394592631] [2020-10-13 04:56:51,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:56:51,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:56:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:56:51,218 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 39 states. [2020-10-13 04:56:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:51,614 INFO L93 Difference]: Finished difference Result 290 states and 301 transitions. [2020-10-13 04:56:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:56:51,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 159 [2020-10-13 04:56:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:51,616 INFO L225 Difference]: With dead ends: 290 [2020-10-13 04:56:51,616 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:56:51,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:56:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:56:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-13 04:56:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:56:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-13 04:56:51,625 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 159 [2020-10-13 04:56:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:51,625 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-13 04:56:51,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:56:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-13 04:56:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:56:51,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:51,627 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:51,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:56:51,628 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -473395826, now seen corresponding path program 36 times [2020-10-13 04:56:51,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:51,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674305098] [2020-10-13 04:56:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:51,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:52,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:56,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:56,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:56:56,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:57,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:57,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:57,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1998 trivial. 0 not checked. [2020-10-13 04:56:57,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674305098] [2020-10-13 04:56:57,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:57,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:56:57,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095928404] [2020-10-13 04:56:57,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:56:57,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:56:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:56:57,578 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 40 states. [2020-10-13 04:56:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:58,121 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2020-10-13 04:56:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:56:58,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 163 [2020-10-13 04:56:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:58,123 INFO L225 Difference]: With dead ends: 297 [2020-10-13 04:56:58,124 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 04:56:58,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:56:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 04:56:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-13 04:56:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:56:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2020-10-13 04:56:58,131 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2020-10-13 04:56:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:58,132 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2020-10-13 04:56:58,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:56:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2020-10-13 04:56:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 04:56:58,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:58,133 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:56:58,133 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1652238028, now seen corresponding path program 37 times [2020-10-13 04:56:58,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:58,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522270181] [2020-10-13 04:56:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:58,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:03,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:03,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 04:57:03,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:57:03,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:57:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 04:57:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:57:03,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:04,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:04,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:04,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2020-10-13 04:57:04,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522270181] [2020-10-13 04:57:04,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:04,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:57:04,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461146288] [2020-10-13 04:57:04,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:57:04,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:57:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:57:04,117 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 41 states. [2020-10-13 04:57:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:04,564 INFO L93 Difference]: Finished difference Result 304 states and 315 transitions. [2020-10-13 04:57:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:57:04,564 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 167 [2020-10-13 04:57:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:04,566 INFO L225 Difference]: With dead ends: 304 [2020-10-13 04:57:04,566 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 04:57:04,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:57:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 04:57:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-13 04:57:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:57:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-13 04:57:04,573 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2020-10-13 04:57:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:04,574 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-13 04:57:04,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:57:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-13 04:57:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:57:04,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:04,575 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:04,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:57:04,576 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1607799858, now seen corresponding path program 38 times [2020-10-13 04:57:04,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:04,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900351475] [2020-10-13 04:57:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:04,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:57:09,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:57:09,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:57:09,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:10,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:10,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:10,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:10,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2223 trivial. 0 not checked. [2020-10-13 04:57:10,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900351475] [2020-10-13 04:57:10,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:10,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:57:10,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146182969] [2020-10-13 04:57:10,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:57:10,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:57:10,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:57:10,657 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 42 states. [2020-10-13 04:57:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:11,156 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2020-10-13 04:57:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:57:11,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 171 [2020-10-13 04:57:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:11,158 INFO L225 Difference]: With dead ends: 311 [2020-10-13 04:57:11,159 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 04:57:11,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:57:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 04:57:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-13 04:57:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-13 04:57:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-13 04:57:11,166 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2020-10-13 04:57:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:11,166 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-13 04:57:11,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:57:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-13 04:57:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 04:57:11,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:11,168 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:11,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:57:11,168 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:11,168 INFO L82 PathProgramCache]: Analyzing trace with hash -181862900, now seen corresponding path program 39 times [2020-10-13 04:57:11,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:11,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4740398] [2020-10-13 04:57:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:11,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:11,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:57:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 04:57:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:57:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:17,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:17,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:17,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:17,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:17,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2340 trivial. 0 not checked. [2020-10-13 04:57:17,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4740398] [2020-10-13 04:57:17,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:17,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:57:17,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348639981] [2020-10-13 04:57:17,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:57:17,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:57:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:57:17,257 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 43 states. [2020-10-13 04:57:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:17,811 INFO L93 Difference]: Finished difference Result 318 states and 329 transitions. [2020-10-13 04:57:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:57:17,812 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 175 [2020-10-13 04:57:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:17,814 INFO L225 Difference]: With dead ends: 318 [2020-10-13 04:57:17,814 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:57:17,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:57:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:57:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-13 04:57:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:57:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-13 04:57:17,822 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2020-10-13 04:57:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:17,822 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-13 04:57:17,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:57:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-13 04:57:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:57:17,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:17,824 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:17,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:57:17,824 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1215186418, now seen corresponding path program 40 times [2020-10-13 04:57:17,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:17,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52467340] [2020-10-13 04:57:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:18,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:22,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:57:22,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:57:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:23,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:23,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:23,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:23,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:23,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:23,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:23,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:23,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:23,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:23,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:23,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2020-10-13 04:57:23,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52467340] [2020-10-13 04:57:23,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:23,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:57:23,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509051210] [2020-10-13 04:57:23,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:57:23,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:57:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:57:23,964 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 44 states. [2020-10-13 04:57:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:24,540 INFO L93 Difference]: Finished difference Result 325 states and 336 transitions. [2020-10-13 04:57:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:57:24,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 179 [2020-10-13 04:57:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:24,543 INFO L225 Difference]: With dead ends: 325 [2020-10-13 04:57:24,543 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 04:57:24,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:57:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 04:57:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-13 04:57:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 04:57:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2020-10-13 04:57:24,551 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 179 [2020-10-13 04:57:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:24,551 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2020-10-13 04:57:24,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:57:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2020-10-13 04:57:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 04:57:24,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:24,552 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:24,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:57:24,553 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1129096524, now seen corresponding path program 41 times [2020-10-13 04:57:24,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:24,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620778033] [2020-10-13 04:57:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:24,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:24,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:29,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:57:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 04:57:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:30,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:30,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:30,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:30,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:30,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 2583 trivial. 0 not checked. [2020-10-13 04:57:30,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620778033] [2020-10-13 04:57:30,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:30,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:57:30,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614214946] [2020-10-13 04:57:30,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:57:30,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:57:30,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:57:30,770 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 45 states. [2020-10-13 04:57:31,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:31,360 INFO L93 Difference]: Finished difference Result 332 states and 343 transitions. [2020-10-13 04:57:31,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:57:31,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 183 [2020-10-13 04:57:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:31,363 INFO L225 Difference]: With dead ends: 332 [2020-10-13 04:57:31,363 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 04:57:31,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:57:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 04:57:31,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-13 04:57:31,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:57:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-13 04:57:31,370 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 183 [2020-10-13 04:57:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:31,371 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-13 04:57:31,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:57:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-13 04:57:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:57:31,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:31,372 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:31,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:57:31,373 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1640695730, now seen corresponding path program 42 times [2020-10-13 04:57:31,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:31,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222022282] [2020-10-13 04:57:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:31,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:31,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:31,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:36,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:36,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:57:36,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:57:36,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:57:36,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:57:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:57:36,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:57:36,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:37,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:37,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:37,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:37,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:37,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 2709 trivial. 0 not checked. [2020-10-13 04:57:37,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222022282] [2020-10-13 04:57:37,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:37,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:57:37,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876614676] [2020-10-13 04:57:37,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:57:37,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:57:37,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:57:37,626 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 46 states.