/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:12:57,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:12:57,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:12:58,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:12:58,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:12:58,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:12:58,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:12:58,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:12:58,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:12:58,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:12:58,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:12:58,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:12:58,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:12:58,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:12:58,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:12:58,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:12:58,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:12:58,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:12:58,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:12:58,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:12:58,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:12:58,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:12:58,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:12:58,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:12:58,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:12:58,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:12:58,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:12:58,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:12:58,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:12:58,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:12:58,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:12:58,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:12:58,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:12:58,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:12:58,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:12:58,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:12:58,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:12:58,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:12:58,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:12:58,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:12:58,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:12:58,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:12:58,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:12:58,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:12:58,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:12:58,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:12:58,129 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:12:58,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:12:58,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:12:58,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:12:58,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:12:58,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:12:58,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:12:58,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:12:58,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:12:58,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:12:58,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:12:58,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:12:58,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:12:58,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:12:58,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:12:58,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:12:58,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:12:58,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:12:58,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:12:58,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:12:58,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:12:58,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:12:58,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:12:58,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:12:58,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:12:58,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:12:58,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:12:58,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:12:58,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:12:58,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:12:58,441 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:12:58,441 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2020-10-14 05:12:58,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a575b6ce/647c5407b48849c99ccee5e9c0e600f3/FLAG6ec39da52 [2020-10-14 05:12:58,893 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:12:58,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2020-10-14 05:12:58,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a575b6ce/647c5407b48849c99ccee5e9c0e600f3/FLAG6ec39da52 [2020-10-14 05:12:59,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a575b6ce/647c5407b48849c99ccee5e9c0e600f3 [2020-10-14 05:12:59,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:12:59,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:12:59,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:12:59,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:12:59,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:12:59,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc81bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59, skipping insertion in model container [2020-10-14 05:12:59,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:12:59,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:12:59,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:12:59,577 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:12:59,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:12:59,626 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:12:59,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59 WrapperNode [2020-10-14 05:12:59,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:12:59,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:12:59,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:12:59,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:12:59,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... [2020-10-14 05:12:59,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:12:59,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:12:59,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:12:59,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:12:59,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:12:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:12:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:12:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:12:59,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 05:12:59,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 05:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:12:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:13:00,071 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:13:00,072 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:13:00,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:00 BoogieIcfgContainer [2020-10-14 05:13:00,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:13:00,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:13:00,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:13:00,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:13:00,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:12:59" (1/3) ... [2020-10-14 05:13:00,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f2363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:00, skipping insertion in model container [2020-10-14 05:13:00,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:12:59" (2/3) ... [2020-10-14 05:13:00,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22f2363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:13:00, skipping insertion in model container [2020-10-14 05:13:00,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:13:00" (3/3) ... [2020-10-14 05:13:00,103 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2020-10-14 05:13:00,120 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:13:00,129 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:13:00,152 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:13:00,183 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:13:00,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:13:00,184 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:13:00,184 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:13:00,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:13:00,184 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:13:00,185 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:13:00,185 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:13:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 05:13:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:13:00,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:00,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:00,225 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-10-14 05:13:00,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:00,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592104320] [2020-10-14 05:13:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:00,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:00,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:13:00,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:00,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-14 05:13:00,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:00,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:00,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:00,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:13:00,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:00,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:13:00,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:00,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:00,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:00,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:00,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:13:00,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:00,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:00,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:00,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:00,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592104320] [2020-10-14 05:13:00,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:00,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:13:00,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986763697] [2020-10-14 05:13:00,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:13:00,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:13:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:00,649 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-14 05:13:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:00,722 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-14 05:13:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:13:00,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:13:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:00,734 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:13:00,734 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:13:00,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:13:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:13:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:13:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:13:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 05:13:00,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 05:13:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:00,778 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 05:13:00,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:13:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 05:13:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:13:00,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:00,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:00,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:13:00,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:00,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:00,781 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-10-14 05:13:00,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:00,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203826375] [2020-10-14 05:13:00,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:00,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:00,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:13:00,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:00,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 05:13:00,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:00,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:13:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:00,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:13:00,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:01,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 05:13:01,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:01,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203826375] [2020-10-14 05:13:01,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:13:01,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:13:01,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570723791] [2020-10-14 05:13:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:13:01,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:13:01,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:01,031 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-14 05:13:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:01,077 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 05:13:01,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:13:01,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-14 05:13:01,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:01,079 INFO L225 Difference]: With dead ends: 22 [2020-10-14 05:13:01,080 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:13:01,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:13:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:13:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:13:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:13:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 05:13:01,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-14 05:13:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:01,088 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 05:13:01,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:13:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 05:13:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:13:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:01,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:01,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:13:01,090 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-10-14 05:13:01,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:01,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774331584] [2020-10-14 05:13:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:13:01,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 05:13:01,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:13:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:01,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:13:01,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:01,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:13:01,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:01,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:01,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:01,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:01,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774331584] [2020-10-14 05:13:01,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:01,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:13:01,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617262513] [2020-10-14 05:13:01,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:13:01,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:13:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:01,235 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-14 05:13:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:01,287 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-14 05:13:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:13:01,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-14 05:13:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:01,288 INFO L225 Difference]: With dead ends: 24 [2020-10-14 05:13:01,289 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:13:01,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:13:01,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:13:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 05:13:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:13:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 05:13:01,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-14 05:13:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:01,296 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 05:13:01,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:13:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 05:13:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:13:01,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:01,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:01,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:13:01,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-10-14 05:13:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:01,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925537669] [2020-10-14 05:13:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:13:01,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-14 05:13:01,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:13:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:01,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:13:01,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:01,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:13:01,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:01,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:13:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:01,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925537669] [2020-10-14 05:13:01,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:01,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:13:01,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499173962] [2020-10-14 05:13:01,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:13:01,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:01,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:13:01,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:13:01,571 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-14 05:13:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:01,646 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-14 05:13:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:13:01,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-14 05:13:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:01,651 INFO L225 Difference]: With dead ends: 26 [2020-10-14 05:13:01,651 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:13:01,652 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 [2020-10-14 05:13:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:13:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 05:13:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:13:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-14 05:13:01,662 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-14 05:13:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:01,663 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-14 05:13:01,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:13:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-14 05:13:01,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:13:01,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:01,665 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:01,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:13:01,665 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-10-14 05:13:01,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:01,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810006525] [2020-10-14 05:13:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:13:01,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-14 05:13:01,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:13:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:01,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:13:01,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:01,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:01,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:01,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:01,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:01,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:01,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:01,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:01,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:01,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810006525] [2020-10-14 05:13:01,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:01,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:13:01,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250123161] [2020-10-14 05:13:01,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:13:01,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:13:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:13:01,905 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-14 05:13:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:01,978 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-14 05:13:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:13:01,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 05:13:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:01,980 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:13:01,980 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:13:01,981 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 [2020-10-14 05:13:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:13:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:13:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:13:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-14 05:13:01,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-14 05:13:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:01,987 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-14 05:13:01,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:13:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-14 05:13:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:13:01,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:01,988 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:01,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:13:01,989 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-10-14 05:13:01,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:01,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726357536] [2020-10-14 05:13:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:13:02,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-14 05:13:02,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:13:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:02,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:13:02,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:02,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:02,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:02,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:02,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:02,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726357536] [2020-10-14 05:13:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:13:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725776286] [2020-10-14 05:13:02,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:13:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:13:02,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:13:02,182 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-14 05:13:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:02,245 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-14 05:13:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:13:02,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-14 05:13:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:02,247 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:13:02,247 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:13:02,247 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 [2020-10-14 05:13:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:13:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 05:13:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:13:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-14 05:13:02,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-14 05:13:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:02,253 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-14 05:13:02,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:13:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-14 05:13:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:13:02,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:02,254 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:02,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:13:02,255 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-10-14 05:13:02,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:02,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391738497] [2020-10-14 05:13:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:13:02,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-14 05:13:02,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:13:02,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:02,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:13:02,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:02,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:02,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:02,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:02,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:02,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:02,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391738497] [2020-10-14 05:13:02,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:02,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:13:02,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968541155] [2020-10-14 05:13:02,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:13:02,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:13:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:13:02,479 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-14 05:13:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:02,535 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-14 05:13:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:13:02,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-14 05:13:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:02,537 INFO L225 Difference]: With dead ends: 32 [2020-10-14 05:13:02,537 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:13:02,538 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 [2020-10-14 05:13:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:13:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 05:13:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:13:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-14 05:13:02,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-14 05:13:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:02,543 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-14 05:13:02,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:13:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-14 05:13:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:13:02,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:02,544 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:02,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:13:02,544 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-10-14 05:13:02,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:02,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473610599] [2020-10-14 05:13:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:13:02,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-14 05:13:02,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:13:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:13:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:02,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:02,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:02,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:02,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:02,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:02,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473610599] [2020-10-14 05:13:02,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:02,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:13:02,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534727233] [2020-10-14 05:13:02,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:13:02,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:13:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:13:02,760 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-14 05:13:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:02,822 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-14 05:13:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:13:02,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 05:13:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:02,823 INFO L225 Difference]: With dead ends: 34 [2020-10-14 05:13:02,823 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:13:02,824 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 [2020-10-14 05:13:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:13:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 05:13:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:13:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-14 05:13:02,828 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-14 05:13:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:02,829 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-14 05:13:02,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:13:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-14 05:13:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:13:02,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:02,830 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:02,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:13:02,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:02,830 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-10-14 05:13:02,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:02,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787013106] [2020-10-14 05:13:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:02,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:02,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:02,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:13:02,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:02,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-14 05:13:02,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:02,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:02,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:13:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:13:02,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:03,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:03,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:03,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:03,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:03,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:03,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:03,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:03,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:03,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:03,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:03,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:03,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787013106] [2020-10-14 05:13:03,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:03,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:13:03,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068494922] [2020-10-14 05:13:03,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:13:03,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:03,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:13:03,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:13:03,071 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-14 05:13:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:03,151 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-14 05:13:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:13:03,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-14 05:13:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:03,153 INFO L225 Difference]: With dead ends: 36 [2020-10-14 05:13:03,153 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 05:13:03,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:13:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 05:13:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 05:13:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:13:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-14 05:13:03,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-14 05:13:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:03,159 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-14 05:13:03,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:13:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-14 05:13:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:13:03,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:03,160 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:03,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:13:03,160 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-10-14 05:13:03,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:03,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060523847] [2020-10-14 05:13:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:03,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:03,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:13:03,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:03,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 05:13:03,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:03,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:13:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:13:03,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:03,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:03,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:03,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:03,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:03,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:03,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:03,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:03,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:03,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:03,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:03,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:03,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060523847] [2020-10-14 05:13:03,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:03,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:13:03,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768621929] [2020-10-14 05:13:03,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:13:03,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:13:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:13:03,460 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-14 05:13:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:03,563 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-14 05:13:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:13:03,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-14 05:13:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:03,565 INFO L225 Difference]: With dead ends: 38 [2020-10-14 05:13:03,565 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:13:03,566 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 [2020-10-14 05:13:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:13:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 05:13:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:13:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-14 05:13:03,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-14 05:13:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:03,572 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-14 05:13:03,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:13:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-14 05:13:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:13:03,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:03,573 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:03,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:13:03,573 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-10-14 05:13:03,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:03,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178313446] [2020-10-14 05:13:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:03,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:03,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:03,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:13:03,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-10-14 05:13:03,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:03,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:13:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:13:03,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:03,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:03,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:03,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:03,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:03,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:03,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:03,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:03,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178313446] [2020-10-14 05:13:03,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:03,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:13:03,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202567267] [2020-10-14 05:13:03,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:13:03,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:03,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:13:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:13:03,970 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-14 05:13:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:04,047 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-14 05:13:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:13:04,048 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-14 05:13:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:04,048 INFO L225 Difference]: With dead ends: 40 [2020-10-14 05:13:04,048 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:13:04,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:13:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:13:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 05:13:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:13:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-14 05:13:04,054 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-14 05:13:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:04,055 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-14 05:13:04,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:13:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-14 05:13:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:13:04,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:04,056 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:04,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:13:04,057 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-10-14 05:13:04,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:04,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556709880] [2020-10-14 05:13:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:04,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:04,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:13:04,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-14 05:13:04,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:04,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:04,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:13:04,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:04,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:13:04,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:04,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:04,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:04,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:04,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:04,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:13:04,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:04,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:04,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:04,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:04,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:04,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:04,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556709880] [2020-10-14 05:13:04,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:04,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:13:04,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368054171] [2020-10-14 05:13:04,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:13:04,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:04,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:13:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:13:04,492 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-14 05:13:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:04,579 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-14 05:13:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:13:04,580 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-14 05:13:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:04,581 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:13:04,582 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:13:04,583 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 [2020-10-14 05:13:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:13:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 05:13:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:13:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-14 05:13:04,590 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-14 05:13:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:04,592 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-14 05:13:04,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:13:04,593 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-14 05:13:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:13:04,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:04,594 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:04,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:13:04,596 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-10-14 05:13:04,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:04,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343715331] [2020-10-14 05:13:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:04,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:04,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:04,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:13:04,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:04,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 365 [2020-10-14 05:13:04,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:04,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:13:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:13:04,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:05,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:05,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:05,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:05,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:05,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:05,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:05,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:05,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343715331] [2020-10-14 05:13:05,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:05,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:13:05,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918364017] [2020-10-14 05:13:05,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:13:05,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:13:05,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:13:05,144 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-14 05:13:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:05,241 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-14 05:13:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:13:05,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-14 05:13:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:05,242 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:13:05,242 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:13:05,243 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 [2020-10-14 05:13:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:13:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 05:13:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:13:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-14 05:13:05,252 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-14 05:13:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:05,252 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-14 05:13:05,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:13:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-14 05:13:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:13:05,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:05,255 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:05,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:13:05,256 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-10-14 05:13:05,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:05,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118084028] [2020-10-14 05:13:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:13:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:05,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-14 05:13:05,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:13:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:05,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:13:05,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:05,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:05,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:05,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:05,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:05,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:05,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:05,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:05,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:05,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:05,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:05,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:13:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118084028] [2020-10-14 05:13:05,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:05,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:13:05,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722279410] [2020-10-14 05:13:05,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:13:05,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:13:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:13:05,849 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-14 05:13:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:05,948 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-14 05:13:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:13:05,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-14 05:13:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:05,950 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:13:05,950 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:13:05,952 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 [2020-10-14 05:13:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:13:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 05:13:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:13:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-14 05:13:05,961 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-14 05:13:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:05,962 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-14 05:13:05,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:13:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-14 05:13:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:13:05,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:05,966 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:05,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:13:05,966 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-10-14 05:13:05,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:05,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284865968] [2020-10-14 05:13:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:13:06,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:06,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-14 05:13:06,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:13:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:06,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:13:06,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:06,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:06,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:06,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:06,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:06,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:06,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:06,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:06,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:06,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:06,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:06,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:06,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284865968] [2020-10-14 05:13:06,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:06,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:13:06,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109913878] [2020-10-14 05:13:06,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:13:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:13:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:13:06,644 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-14 05:13:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:06,754 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-14 05:13:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:13:06,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-14 05:13:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:06,756 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:13:06,756 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 05:13:06,757 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 [2020-10-14 05:13:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 05:13:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 05:13:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:13:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-14 05:13:06,761 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-14 05:13:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:06,761 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-14 05:13:06,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:13:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-14 05:13:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:13:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:06,763 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:13:06,763 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-10-14 05:13:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560210148] [2020-10-14 05:13:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:06,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:07,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:13:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:07,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:13:07,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:07,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:07,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:07,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:07,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:07,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:07,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:07,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560210148] [2020-10-14 05:13:07,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:07,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:13:07,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149726337] [2020-10-14 05:13:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:13:07,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:13:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:13:07,352 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-14 05:13:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:07,470 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-14 05:13:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:13:07,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-14 05:13:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:07,472 INFO L225 Difference]: With dead ends: 50 [2020-10-14 05:13:07,472 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:13:07,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:13:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:13:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 05:13:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:13:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-14 05:13:07,477 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-14 05:13:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:07,478 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-14 05:13:07,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:13:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-14 05:13:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:13:07,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:07,479 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:07,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:13:07,479 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-10-14 05:13:07,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:07,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514520785] [2020-10-14 05:13:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:07,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:07,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:13:07,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:07,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-14 05:13:07,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:07,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:13:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:07,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:13:07,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:08,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:08,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:08,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:08,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:08,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:08,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:08,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:08,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:08,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:08,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514520785] [2020-10-14 05:13:08,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:08,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:13:08,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296839959] [2020-10-14 05:13:08,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:13:08,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:08,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:13:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:13:08,080 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-14 05:13:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:08,199 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-14 05:13:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:13:08,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 05:13:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:08,200 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:13:08,201 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:13:08,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:13:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:13:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 05:13:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:13:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-14 05:13:08,206 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-14 05:13:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:08,206 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-14 05:13:08,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:13:08,207 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-14 05:13:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:13:08,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:08,208 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:08,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:13:08,208 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-10-14 05:13:08,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:08,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625206221] [2020-10-14 05:13:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:08,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:08,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:13:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:08,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:13:08,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:08,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:08,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:08,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:08,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:08,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:08,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:08,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:08,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:08,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:08,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:08,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625206221] [2020-10-14 05:13:08,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:08,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:13:08,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931367228] [2020-10-14 05:13:08,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:13:08,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:08,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:13:08,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:13:08,904 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-14 05:13:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:09,030 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-14 05:13:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:13:09,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-14 05:13:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:09,031 INFO L225 Difference]: With dead ends: 54 [2020-10-14 05:13:09,031 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:13:09,032 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 [2020-10-14 05:13:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:13:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 05:13:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:13:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-14 05:13:09,036 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-14 05:13:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:09,037 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-14 05:13:09,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:13:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-14 05:13:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:13:09,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:09,038 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:09,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:13:09,038 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-10-14 05:13:09,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:09,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405991208] [2020-10-14 05:13:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:09,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:09,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:13:09,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:09,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 503 [2020-10-14 05:13:09,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:09,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:09,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:13:09,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:13:09,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:09,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:09,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:09,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:09,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:09,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:09,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:09,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405991208] [2020-10-14 05:13:09,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:09,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:13:09,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137282457] [2020-10-14 05:13:09,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:13:09,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:13:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:13:09,805 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-14 05:13:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:09,910 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-14 05:13:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:13:09,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 05:13:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:09,912 INFO L225 Difference]: With dead ends: 56 [2020-10-14 05:13:09,912 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:13:09,913 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 [2020-10-14 05:13:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:13:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 05:13:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:13:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-14 05:13:09,917 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-14 05:13:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:09,917 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-14 05:13:09,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:13:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-14 05:13:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:13:09,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:09,918 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:09,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:13:09,919 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-10-14 05:13:09,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:09,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486166699] [2020-10-14 05:13:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:10,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:10,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:13:10,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:10,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-14 05:13:10,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:10,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:10,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:13:10,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:10,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:13:10,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:10,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:10,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:10,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:10,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:10,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:10,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:10,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:10,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486166699] [2020-10-14 05:13:10,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:10,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:13:10,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547264043] [2020-10-14 05:13:10,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:13:10,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:10,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:13:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:13:10,837 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-14 05:13:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:10,929 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-14 05:13:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:13:10,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-14 05:13:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:10,931 INFO L225 Difference]: With dead ends: 58 [2020-10-14 05:13:10,931 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:13:10,932 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 [2020-10-14 05:13:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:13:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 05:13:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:13:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-14 05:13:10,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-14 05:13:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:10,942 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-14 05:13:10,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:13:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-14 05:13:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:13:10,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:10,947 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:10,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:13:10,947 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:10,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-10-14 05:13:10,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:10,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012870540] [2020-10-14 05:13:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:11,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:11,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:13:11,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:11,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 525 [2020-10-14 05:13:11,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:11,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:13:11,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:11,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:11,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:11,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:11,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:11,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:11,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:11,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:11,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:11,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012870540] [2020-10-14 05:13:11,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:11,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:13:11,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723123416] [2020-10-14 05:13:11,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:13:11,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:13:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:13:11,869 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-14 05:13:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:12,058 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-14 05:13:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:13:12,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 05:13:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:12,060 INFO L225 Difference]: With dead ends: 60 [2020-10-14 05:13:12,060 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 05:13:12,061 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 [2020-10-14 05:13:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 05:13:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 05:13:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:13:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-14 05:13:12,065 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-14 05:13:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:12,065 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-14 05:13:12,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:13:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-14 05:13:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:13:12,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:12,066 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:12,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:13:12,067 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:12,067 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-10-14 05:13:12,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:12,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856200845] [2020-10-14 05:13:12,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:12,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:12,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:12,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:13:12,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:12,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 683 [2020-10-14 05:13:12,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:12,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:13:12,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:12,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:13:12,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:13,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:13,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:13,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856200845] [2020-10-14 05:13:13,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:13,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:13:13,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457468811] [2020-10-14 05:13:13,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:13:13,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:13:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:13:13,066 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-14 05:13:13,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:13,150 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-14 05:13:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:13:13,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-14 05:13:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:13,153 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:13:13,153 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:13:13,154 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 [2020-10-14 05:13:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:13:13,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 05:13:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:13:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-14 05:13:13,159 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-14 05:13:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:13,160 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-14 05:13:13,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:13:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-14 05:13:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:13:13,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:13,161 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:13,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:13:13,161 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:13,162 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-10-14 05:13:13,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:13,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933942929] [2020-10-14 05:13:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:13,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:13,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:13,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:13:13,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:13,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-14 05:13:13,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:13,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:13:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:13,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:13:13,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:14,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:14,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:14,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933942929] [2020-10-14 05:13:14,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:14,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:13:14,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424869923] [2020-10-14 05:13:14,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:13:14,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:14,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:13:14,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:13:14,169 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-14 05:13:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:14,291 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-14 05:13:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:13:14,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 05:13:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:14,292 INFO L225 Difference]: With dead ends: 64 [2020-10-14 05:13:14,292 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 05:13:14,293 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 [2020-10-14 05:13:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 05:13:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-14 05:13:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:13:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-14 05:13:14,297 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-14 05:13:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:14,297 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-14 05:13:14,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:13:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-14 05:13:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:13:14,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:14,298 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:14,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:13:14,299 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-10-14 05:13:14,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370977435] [2020-10-14 05:13:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:14,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:14,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:13:14,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:14,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 05:13:14,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:14,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:13:14,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:14,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:13:14,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:15,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:15,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:15,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:15,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:15,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:15,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:15,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:15,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:15,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:15,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:15,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:15,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:15,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370977435] [2020-10-14 05:13:15,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:15,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:13:15,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819618211] [2020-10-14 05:13:15,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:13:15,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:15,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:13:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:13:15,372 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-14 05:13:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:15,518 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-14 05:13:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:13:15,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-14 05:13:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:15,520 INFO L225 Difference]: With dead ends: 66 [2020-10-14 05:13:15,520 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:13:15,521 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 [2020-10-14 05:13:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:13:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 05:13:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:13:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-14 05:13:15,527 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-14 05:13:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:15,527 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-14 05:13:15,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:13:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-14 05:13:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:13:15,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:15,528 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:15,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:13:15,532 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-10-14 05:13:15,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:15,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716687702] [2020-10-14 05:13:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:16,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:13:16,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-14 05:13:16,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:16,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:13:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:13:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:16,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:16,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:16,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:16,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716687702] [2020-10-14 05:13:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:16,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:13:16,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136704607] [2020-10-14 05:13:16,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:13:16,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:16,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:13:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:13:16,620 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-14 05:13:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:16,781 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-14 05:13:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:13:16,781 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-14 05:13:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:16,782 INFO L225 Difference]: With dead ends: 68 [2020-10-14 05:13:16,782 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:13:16,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:13:16,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:13:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 05:13:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:13:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-14 05:13:16,786 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-14 05:13:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:16,787 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-14 05:13:16,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:13:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-14 05:13:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:13:16,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:16,788 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:16,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:13:16,788 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-10-14 05:13:16,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:16,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854927744] [2020-10-14 05:13:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:17,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:17,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:13:17,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:17,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:13:17,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:17,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:17,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:17,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:17,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:17,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:17,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:17,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:17,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:17,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:17,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:17,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:17,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854927744] [2020-10-14 05:13:17,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:17,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:13:17,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497235424] [2020-10-14 05:13:17,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:13:17,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:13:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:13:17,971 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-14 05:13:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:18,174 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-14 05:13:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:13:18,174 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-14 05:13:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:18,175 INFO L225 Difference]: With dead ends: 70 [2020-10-14 05:13:18,175 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:13:18,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:13:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:13:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 05:13:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:13:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-14 05:13:18,186 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-14 05:13:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:18,186 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-14 05:13:18,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:13:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-14 05:13:18,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:13:18,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:18,190 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:18,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:13:18,191 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:18,191 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-10-14 05:13:18,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:18,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106779680] [2020-10-14 05:13:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:18,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:18,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:13:18,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-14 05:13:18,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:18,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:13:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:18,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:13:18,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:19,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106779680] [2020-10-14 05:13:19,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:19,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:13:19,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873697084] [2020-10-14 05:13:19,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:13:19,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:13:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:13:19,400 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-14 05:13:19,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:19,593 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-14 05:13:19,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:13:19,593 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-14 05:13:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:19,595 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:13:19,595 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:13:19,596 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 [2020-10-14 05:13:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:13:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 05:13:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:13:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-14 05:13:19,601 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-14 05:13:19,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:19,602 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-14 05:13:19,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:13:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-14 05:13:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:13:19,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:19,603 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:19,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:13:19,603 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-10-14 05:13:19,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:19,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765300582] [2020-10-14 05:13:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:19,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:20,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:13:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:13:20,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:21,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:21,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:21,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:21,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:21,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:21,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:21,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:21,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:21,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:21,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:21,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765300582] [2020-10-14 05:13:21,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:21,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:13:21,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304856710] [2020-10-14 05:13:21,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:13:21,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:13:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:13:21,181 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-14 05:13:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:21,411 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-14 05:13:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:13:21,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-14 05:13:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:21,413 INFO L225 Difference]: With dead ends: 74 [2020-10-14 05:13:21,413 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 05:13:21,414 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 [2020-10-14 05:13:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 05:13:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-14 05:13:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:13:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-14 05:13:21,419 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-14 05:13:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:21,420 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-14 05:13:21,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:13:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-14 05:13:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:13:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:21,421 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:21,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:13:21,422 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-10-14 05:13:21,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:21,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935122290] [2020-10-14 05:13:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:22,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:22,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:13:22,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-14 05:13:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:22,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:13:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:22,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:13:22,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:22,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:22,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:22,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:22,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:22,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:22,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:22,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:22,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:22,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:22,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935122290] [2020-10-14 05:13:22,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:22,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:13:22,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168155595] [2020-10-14 05:13:22,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:13:22,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:13:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:13:22,905 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-14 05:13:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:23,122 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-14 05:13:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:13:23,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-14 05:13:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:23,124 INFO L225 Difference]: With dead ends: 76 [2020-10-14 05:13:23,124 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:13:23,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:13:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:13:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 05:13:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:13:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-14 05:13:23,128 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-14 05:13:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:23,129 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-14 05:13:23,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:13:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-14 05:13:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:13:23,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:23,130 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:23,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:13:23,130 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-10-14 05:13:23,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:23,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840861710] [2020-10-14 05:13:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:23,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:23,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:13:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:13:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:24,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:24,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:24,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:24,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:24,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:24,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:24,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:24,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:24,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:24,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840861710] [2020-10-14 05:13:24,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:24,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:13:24,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921601353] [2020-10-14 05:13:24,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:13:24,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:13:24,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:13:24,485 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-14 05:13:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:24,680 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-14 05:13:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:13:24,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-14 05:13:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:24,685 INFO L225 Difference]: With dead ends: 78 [2020-10-14 05:13:24,685 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:13:24,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:13:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:13:24,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-14 05:13:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:13:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-14 05:13:24,693 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-14 05:13:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:24,693 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-14 05:13:24,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:13:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-14 05:13:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:13:24,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:24,695 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:24,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:13:24,696 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-10-14 05:13:24,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:24,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845418921] [2020-10-14 05:13:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:25,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:25,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:13:25,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 772 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:13:25,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:26,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:26,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:26,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:26,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:26,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:26,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:26,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:26,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845418921] [2020-10-14 05:13:26,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:26,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:13:26,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943979796] [2020-10-14 05:13:26,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:13:26,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:13:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:13:26,120 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-14 05:13:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:26,346 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-14 05:13:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:13:26,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-14 05:13:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:26,347 INFO L225 Difference]: With dead ends: 80 [2020-10-14 05:13:26,348 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:13:26,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:13:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:13:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 05:13:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:13:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-14 05:13:26,353 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-14 05:13:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:26,353 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-14 05:13:26,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:13:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-14 05:13:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:13:26,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:26,356 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:26,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:13:26,356 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-10-14 05:13:26,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:26,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16697128] [2020-10-14 05:13:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:26,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:27,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:27,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:13:27,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:27,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-14 05:13:27,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:27,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:13:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:27,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:13:27,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:27,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:27,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:27,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:27,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:27,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:13:27,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:27,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:27,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:27,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16697128] [2020-10-14 05:13:27,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:27,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:13:27,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623690952] [2020-10-14 05:13:27,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:13:27,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:13:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:13:27,694 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-14 05:13:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:27,914 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-14 05:13:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:13:27,914 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-14 05:13:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:27,915 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:13:27,916 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:13:27,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:13:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:13:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-14 05:13:27,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:13:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-14 05:13:27,922 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-14 05:13:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:27,922 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-14 05:13:27,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:13:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-14 05:13:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:13:27,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:27,923 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:27,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:13:27,924 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:27,924 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-10-14 05:13:27,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:27,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986766241] [2020-10-14 05:13:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:27,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:28,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:28,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:13:28,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:28,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:13:28,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:29,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:29,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:29,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:29,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:29,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:29,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:29,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:13:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:29,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986766241] [2020-10-14 05:13:29,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:29,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:13:29,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339489132] [2020-10-14 05:13:29,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:13:29,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:13:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:13:29,328 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-14 05:13:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:29,536 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-14 05:13:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:13:29,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-14 05:13:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:29,537 INFO L225 Difference]: With dead ends: 84 [2020-10-14 05:13:29,537 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:13:29,538 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 [2020-10-14 05:13:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:13:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-14 05:13:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:13:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-14 05:13:29,542 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-14 05:13:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:29,543 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-14 05:13:29,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:13:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-14 05:13:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:13:29,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:29,544 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:29,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:13:29,544 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-10-14 05:13:29,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:29,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361101179] [2020-10-14 05:13:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:13:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:30,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:13:30,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:30,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:30,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:30,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:30,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:30,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:30,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:30,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:30,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:30,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:30,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:30,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361101179] [2020-10-14 05:13:30,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:30,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:13:30,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460434737] [2020-10-14 05:13:30,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:13:30,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:30,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:13:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:13:30,975 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-14 05:13:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:31,156 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-14 05:13:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:13:31,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-14 05:13:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:31,158 INFO L225 Difference]: With dead ends: 86 [2020-10-14 05:13:31,158 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:13:31,159 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 [2020-10-14 05:13:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:13:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 05:13:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:13:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-14 05:13:31,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-14 05:13:31,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:31,164 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-14 05:13:31,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:13:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-14 05:13:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:13:31,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:31,165 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:31,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:13:31,165 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:31,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-10-14 05:13:31,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:31,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752885157] [2020-10-14 05:13:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:31,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 817 [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:13:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 05:13:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:32,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:32,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:32,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752885157] [2020-10-14 05:13:32,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:32,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:13:32,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339949637] [2020-10-14 05:13:32,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:13:32,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:13:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:13:32,681 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-14 05:13:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:32,919 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-14 05:13:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:13:32,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-14 05:13:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:32,921 INFO L225 Difference]: With dead ends: 88 [2020-10-14 05:13:32,921 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 05:13:32,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:13:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 05:13:32,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-14 05:13:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:13:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-14 05:13:32,927 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-14 05:13:32,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:32,927 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-14 05:13:32,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:13:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-14 05:13:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:13:32,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:32,928 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:32,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:13:32,929 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-10-14 05:13:32,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:32,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414571568] [2020-10-14 05:13:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:32,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:33,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:33,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:13:33,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:33,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 908 [2020-10-14 05:13:33,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:33,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:13:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 05:13:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:34,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:34,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:34,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414571568] [2020-10-14 05:13:34,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:34,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:13:34,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89053193] [2020-10-14 05:13:34,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:13:34,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:13:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:13:34,596 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-14 05:13:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:34,814 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-14 05:13:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:13:34,814 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-14 05:13:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:34,816 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:13:34,816 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 05:13:34,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:13:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 05:13:34,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 05:13:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:13:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-14 05:13:34,821 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-14 05:13:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:34,821 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-14 05:13:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:13:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-14 05:13:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:13:34,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:34,822 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:34,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:13:34,823 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:34,823 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-10-14 05:13:34,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:34,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772334472] [2020-10-14 05:13:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:34,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:35,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:35,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:13:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-14 05:13:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:35,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:13:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:35,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 05:13:35,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:36,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:36,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:36,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:36,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:36,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772334472] [2020-10-14 05:13:36,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:36,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:13:36,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785566909] [2020-10-14 05:13:36,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:13:36,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:13:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:13:36,557 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-14 05:13:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:36,722 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-14 05:13:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:13:36,723 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-14 05:13:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:36,724 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:13:36,724 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:13:36,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:13:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:13:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-14 05:13:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:13:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-14 05:13:36,730 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-14 05:13:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:36,731 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-14 05:13:36,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:13:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-14 05:13:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:13:36,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:36,732 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:36,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:13:36,732 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-10-14 05:13:36,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:36,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252470484] [2020-10-14 05:13:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:36,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:37,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:37,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 05:13:37,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:38,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:38,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:38,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:38,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252470484] [2020-10-14 05:13:38,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:38,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:13:38,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305190763] [2020-10-14 05:13:38,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:13:38,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:13:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:13:38,604 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-14 05:13:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:38,867 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-14 05:13:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:13:38,867 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-14 05:13:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:38,869 INFO L225 Difference]: With dead ends: 94 [2020-10-14 05:13:38,869 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:13:38,870 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 [2020-10-14 05:13:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:13:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 05:13:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:13:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-14 05:13:38,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-14 05:13:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:38,875 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-14 05:13:38,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:13:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-14 05:13:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:13:38,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:38,876 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:38,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:13:38,876 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-10-14 05:13:38,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:38,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736940347] [2020-10-14 05:13:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:39,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:39,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:13:39,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:39,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1077 [2020-10-14 05:13:39,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:39,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:13:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 05:13:39,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:40,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:40,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:40,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:40,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736940347] [2020-10-14 05:13:40,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:40,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:13:40,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992020895] [2020-10-14 05:13:40,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:13:40,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:13:40,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:13:40,841 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-14 05:13:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:41,107 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-14 05:13:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:13:41,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-14 05:13:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:41,109 INFO L225 Difference]: With dead ends: 96 [2020-10-14 05:13:41,109 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 05:13:41,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:13:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 05:13:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-14 05:13:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:13:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-14 05:13:41,115 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-14 05:13:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:41,115 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-14 05:13:41,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:13:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-14 05:13:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:13:41,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:41,117 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:41,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:13:41,117 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-10-14 05:13:41,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:41,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842802638] [2020-10-14 05:13:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:41,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:42,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:42,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:13:42,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 05:13:42,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:43,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:43,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:43,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:43,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:43,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:43,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842802638] [2020-10-14 05:13:43,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:43,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 05:13:43,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506773742] [2020-10-14 05:13:43,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 05:13:43,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:43,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 05:13:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:13:43,117 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-14 05:13:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:43,378 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-14 05:13:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 05:13:43,379 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-14 05:13:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:43,380 INFO L225 Difference]: With dead ends: 98 [2020-10-14 05:13:43,380 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:13:43,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:13:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:13:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 05:13:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:13:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-14 05:13:43,385 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-14 05:13:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:43,386 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-14 05:13:43,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 05:13:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-14 05:13:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:13:43,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:43,387 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:43,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:13:43,387 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-10-14 05:13:43,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:43,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41677406] [2020-10-14 05:13:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:43,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1314 [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:44,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 05:13:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 05:13:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:45,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:45,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:45,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41677406] [2020-10-14 05:13:45,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:45,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 05:13:45,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052715003] [2020-10-14 05:13:45,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 05:13:45,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 05:13:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:13:45,658 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-14 05:13:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:45,933 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-14 05:13:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:13:45,933 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-14 05:13:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:45,935 INFO L225 Difference]: With dead ends: 100 [2020-10-14 05:13:45,935 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 05:13:45,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:13:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 05:13:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 05:13:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:13:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-14 05:13:45,943 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-14 05:13:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:45,943 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-14 05:13:45,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 05:13:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-14 05:13:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:13:45,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:45,944 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:45,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:13:45,945 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-10-14 05:13:45,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:45,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516185722] [2020-10-14 05:13:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:47,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 05:13:47,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:47,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 05:13:47,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:48,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:48,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:48,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:48,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:48,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:48,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516185722] [2020-10-14 05:13:48,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:48,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 05:13:48,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983075586] [2020-10-14 05:13:48,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 05:13:48,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 05:13:48,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:13:48,177 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-14 05:13:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:48,377 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-14 05:13:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:13:48,378 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-14 05:13:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:48,379 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:13:48,379 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:13:48,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:13:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:13:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 05:13:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:13:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-14 05:13:48,386 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-14 05:13:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:48,387 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-14 05:13:48,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 05:13:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-14 05:13:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:13:48,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:48,388 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:48,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:13:48,388 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:48,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-10-14 05:13:48,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:48,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368528314] [2020-10-14 05:13:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:48,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:49,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 05:13:49,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:50,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:50,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:50,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:50,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:50,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:50,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:50,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:50,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368528314] [2020-10-14 05:13:50,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:50,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 05:13:50,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134239822] [2020-10-14 05:13:50,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 05:13:50,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:50,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 05:13:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:13:50,718 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-14 05:13:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:51,004 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-14 05:13:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 05:13:51,005 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-14 05:13:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:51,006 INFO L225 Difference]: With dead ends: 104 [2020-10-14 05:13:51,007 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:13:51,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:13:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:13:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 05:13:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:13:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-14 05:13:51,025 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-14 05:13:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:51,026 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-14 05:13:51,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 05:13:51,026 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-14 05:13:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:13:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:51,027 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:51,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:13:51,027 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:51,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:51,028 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-10-14 05:13:51,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:51,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415586681] [2020-10-14 05:13:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:51,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:52,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 05:13:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:52,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 05:13:52,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:53,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:53,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:53,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:53,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:53,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:53,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415586681] [2020-10-14 05:13:53,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:53,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 05:13:53,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801955705] [2020-10-14 05:13:53,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 05:13:53,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 05:13:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:13:53,597 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-14 05:13:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:53,776 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-14 05:13:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 05:13:53,777 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-14 05:13:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:53,778 INFO L225 Difference]: With dead ends: 106 [2020-10-14 05:13:53,778 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 05:13:53,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:13:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 05:13:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-14 05:13:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:13:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-14 05:13:53,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-14 05:13:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:53,785 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-14 05:13:53,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 05:13:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-14 05:13:53,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:13:53,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:53,786 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:53,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:13:53,786 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-10-14 05:13:53,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:53,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288084358] [2020-10-14 05:13:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:53,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:55,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:55,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:13:55,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:55,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 05:13:55,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:56,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:56,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:56,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:56,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:56,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288084358] [2020-10-14 05:13:56,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:56,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 05:13:56,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151800728] [2020-10-14 05:13:56,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 05:13:56,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 05:13:56,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:13:56,502 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-14 05:13:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:56,805 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-14 05:13:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:13:56,805 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-14 05:13:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:56,807 INFO L225 Difference]: With dead ends: 108 [2020-10-14 05:13:56,807 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 05:13:56,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:13:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 05:13:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-14 05:13:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:13:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-14 05:13:56,814 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-14 05:13:56,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:56,814 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-14 05:13:56,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 05:13:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-14 05:13:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:13:56,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:56,815 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:56,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:13:56,815 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-10-14 05:13:56,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:56,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460068733] [2020-10-14 05:13:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:56,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:58,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:58,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:13:58,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:58,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 05:13:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:13:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:13:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:13:59,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:13:59,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:13:59,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:13:59,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:13:59,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:13:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:13:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:13:59,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:13:59,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:13:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:13:59,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460068733] [2020-10-14 05:13:59,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:13:59,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 05:13:59,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663017234] [2020-10-14 05:13:59,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 05:13:59,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:13:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 05:13:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:13:59,613 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-14 05:13:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:13:59,846 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-14 05:13:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:13:59,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-14 05:13:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:13:59,849 INFO L225 Difference]: With dead ends: 110 [2020-10-14 05:13:59,849 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:13:59,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:13:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:13:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 05:13:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:13:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-14 05:13:59,854 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-14 05:13:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:13:59,854 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-14 05:13:59,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 05:13:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-14 05:13:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:13:59,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:13:59,855 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:13:59,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:13:59,855 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:13:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:13:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-10-14 05:13:59,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:13:59,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518607077] [2020-10-14 05:13:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:13:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:13:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:01,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:01,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1705 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 05:14:01,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:02,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:02,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:02,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:02,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518607077] [2020-10-14 05:14:02,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:02,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 05:14:02,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514485724] [2020-10-14 05:14:02,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 05:14:02,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 05:14:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:14:02,862 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-14 05:14:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:03,074 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-14 05:14:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:14:03,074 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-14 05:14:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:03,076 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:14:03,076 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:14:03,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:14:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:14:03,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-14 05:14:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 05:14:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-14 05:14:03,080 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-14 05:14:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:03,081 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-14 05:14:03,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 05:14:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-14 05:14:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:14:03,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:03,082 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:03,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:14:03,082 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-10-14 05:14:03,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:03,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328465261] [2020-10-14 05:14:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:04,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:04,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 05:14:04,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:06,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:06,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:06,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:06,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:06,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:06,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:06,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:06,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328465261] [2020-10-14 05:14:06,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:06,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 05:14:06,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550960352] [2020-10-14 05:14:06,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 05:14:06,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:06,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 05:14:06,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:14:06,163 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-14 05:14:06,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:06,362 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-14 05:14:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 05:14:06,363 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-14 05:14:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:06,364 INFO L225 Difference]: With dead ends: 114 [2020-10-14 05:14:06,364 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 05:14:06,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:14:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 05:14:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 05:14:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:14:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-14 05:14:06,370 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-14 05:14:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:06,370 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-14 05:14:06,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 05:14:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-14 05:14:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:14:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:06,371 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:06,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:14:06,372 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-10-14 05:14:06,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:06,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106950353] [2020-10-14 05:14:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:06,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:08,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:08,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:14:08,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1907 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 05:14:08,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:09,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:09,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:09,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:09,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:09,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:09,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106950353] [2020-10-14 05:14:09,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:09,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 05:14:09,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129812121] [2020-10-14 05:14:09,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 05:14:09,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 05:14:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:14:09,673 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-14 05:14:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:09,879 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-14 05:14:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 05:14:09,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-14 05:14:09,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:09,880 INFO L225 Difference]: With dead ends: 116 [2020-10-14 05:14:09,880 INFO L226 Difference]: Without dead ends: 110 [2020-10-14 05:14:09,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:14:09,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-14 05:14:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-14 05:14:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:14:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-14 05:14:09,886 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-14 05:14:09,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:09,887 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-14 05:14:09,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 05:14:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-14 05:14:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:14:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:09,888 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:09,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:14:09,888 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:09,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-10-14 05:14:09,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:09,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120563862] [2020-10-14 05:14:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:09,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:12,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:12,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:14:12,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:12,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 05:14:12,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:13,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:13,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:13,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:13,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:13,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:14,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120563862] [2020-10-14 05:14:14,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:14,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 05:14:14,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659848935] [2020-10-14 05:14:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 05:14:14,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:14,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 05:14:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:14:14,005 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-14 05:14:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:14,211 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-14 05:14:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 05:14:14,212 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-14 05:14:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:14,214 INFO L225 Difference]: With dead ends: 118 [2020-10-14 05:14:14,214 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 05:14:14,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:14:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 05:14:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 05:14:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 05:14:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-14 05:14:14,221 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-14 05:14:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:14,221 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-14 05:14:14,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 05:14:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-14 05:14:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:14:14,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:14,223 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:14,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:14:14,223 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-10-14 05:14:14,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:14,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756210633] [2020-10-14 05:14:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:16,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:16,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:14:16,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2067 [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 05:14:16,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:17,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:17,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:17,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:17,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:17,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:17,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756210633] [2020-10-14 05:14:17,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:17,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 05:14:17,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695281841] [2020-10-14 05:14:17,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 05:14:17,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 05:14:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:14:17,808 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-14 05:14:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:18,047 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-14 05:14:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:14:18,048 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-14 05:14:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:18,050 INFO L225 Difference]: With dead ends: 120 [2020-10-14 05:14:18,050 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:14:18,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:14:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:14:18,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 05:14:18,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:14:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-14 05:14:18,055 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-14 05:14:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:18,055 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-14 05:14:18,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 05:14:18,056 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-14 05:14:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:14:18,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:18,056 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:18,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:14:18,057 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-10-14 05:14:18,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:18,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650949558] [2020-10-14 05:14:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:18,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:20,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2141 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 05:14:20,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:20,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 05:14:20,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:21,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:21,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:21,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:21,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:21,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:21,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:21,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:21,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:21,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:21,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650949558] [2020-10-14 05:14:21,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:21,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 05:14:21,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653280864] [2020-10-14 05:14:21,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 05:14:21,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 05:14:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:14:21,772 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-14 05:14:22,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:22,107 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-14 05:14:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 05:14:22,107 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-14 05:14:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:22,109 INFO L225 Difference]: With dead ends: 122 [2020-10-14 05:14:22,109 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 05:14:22,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:14:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 05:14:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-14 05:14:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:14:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-14 05:14:22,114 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-14 05:14:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:22,114 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-14 05:14:22,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 05:14:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-14 05:14:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:14:22,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:22,116 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:22,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:14:22,116 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:22,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1398224925, now seen corresponding path program 51 times [2020-10-14 05:14:22,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:22,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460048693] [2020-10-14 05:14:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:22,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:24,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 05:14:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 05:14:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:25,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:25,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:25,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:25,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:25,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:25,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:14:25,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:25,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:25,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:25,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:25,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:25,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460048693] [2020-10-14 05:14:25,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:25,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 05:14:25,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706258433] [2020-10-14 05:14:25,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 05:14:25,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 05:14:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:14:25,997 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-14 05:14:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:26,333 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-14 05:14:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 05:14:26,334 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-14 05:14:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:26,336 INFO L225 Difference]: With dead ends: 124 [2020-10-14 05:14:26,336 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:14:26,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:14:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:14:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 05:14:26,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:14:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-14 05:14:26,341 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-14 05:14:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:26,342 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-14 05:14:26,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 05:14:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-14 05:14:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:14:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:26,343 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:26,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:14:26,343 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -210110971, now seen corresponding path program 52 times [2020-10-14 05:14:26,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:26,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987162186] [2020-10-14 05:14:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:26,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:28,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:28,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2306 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 05:14:28,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:30,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:30,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:30,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:30,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:30,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:30,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987162186] [2020-10-14 05:14:30,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:30,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 05:14:30,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615744293] [2020-10-14 05:14:30,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 05:14:30,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:30,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 05:14:30,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:14:30,313 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-14 05:14:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:30,656 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-14 05:14:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 05:14:30,656 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-14 05:14:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:30,657 INFO L225 Difference]: With dead ends: 126 [2020-10-14 05:14:30,657 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 05:14:30,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:14:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 05:14:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-14 05:14:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:14:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-14 05:14:30,663 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-14 05:14:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:30,664 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-14 05:14:30,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 05:14:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-14 05:14:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:14:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:30,665 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:30,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:14:30,666 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash -893901913, now seen corresponding path program 53 times [2020-10-14 05:14:30,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:30,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957751241] [2020-10-14 05:14:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:30,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:33,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2524 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 05:14:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:33,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 05:14:33,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:34,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:34,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:34,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:34,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:34,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:34,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:34,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:34,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957751241] [2020-10-14 05:14:34,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:34,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 05:14:34,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341034271] [2020-10-14 05:14:34,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 05:14:34,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:34,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 05:14:34,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:14:34,884 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-14 05:14:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:35,147 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-14 05:14:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 05:14:35,148 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-14 05:14:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:35,149 INFO L225 Difference]: With dead ends: 128 [2020-10-14 05:14:35,149 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 05:14:35,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:14:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 05:14:35,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 05:14:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:14:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-14 05:14:35,155 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-14 05:14:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:35,155 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-14 05:14:35,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 05:14:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-14 05:14:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:14:35,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:35,157 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:35,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:14:35,157 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:35,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:35,157 INFO L82 PathProgramCache]: Analyzing trace with hash -887000887, now seen corresponding path program 54 times [2020-10-14 05:14:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:35,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607734379] [2020-10-14 05:14:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:35,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:37,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:37,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:14:37,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 05:14:37,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:39,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:39,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:39,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:39,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:39,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:39,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607734379] [2020-10-14 05:14:39,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:39,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 05:14:39,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805481938] [2020-10-14 05:14:39,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 05:14:39,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:39,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 05:14:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:14:39,737 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-14 05:14:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:40,118 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-14 05:14:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 05:14:40,118 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-14 05:14:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:40,120 INFO L225 Difference]: With dead ends: 130 [2020-10-14 05:14:40,120 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 05:14:40,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:14:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 05:14:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-14 05:14:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:14:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-14 05:14:40,125 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-14 05:14:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:40,125 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-14 05:14:40,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 05:14:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-14 05:14:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:14:40,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:40,126 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:40,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:14:40,127 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:40,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:40,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1449917803, now seen corresponding path program 55 times [2020-10-14 05:14:40,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:40,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932230943] [2020-10-14 05:14:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:42,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2741 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:42,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 05:14:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:44,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:44,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:44,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:44,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932230943] [2020-10-14 05:14:44,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:44,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 05:14:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034296379] [2020-10-14 05:14:44,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 05:14:44,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:44,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 05:14:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:14:44,739 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-14 05:14:44,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:44,979 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-14 05:14:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 05:14:44,980 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-14 05:14:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:44,981 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:14:44,982 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 05:14:44,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:14:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 05:14:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-14 05:14:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:14:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-14 05:14:44,986 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-14 05:14:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:44,987 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-14 05:14:44,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 05:14:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-14 05:14:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:14:44,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:44,988 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:44,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:14:44,988 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 960883085, now seen corresponding path program 56 times [2020-10-14 05:14:44,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:44,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061287741] [2020-10-14 05:14:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:45,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:47,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2853 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 05:14:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:49,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:49,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:49,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:49,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:49,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:49,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061287741] [2020-10-14 05:14:49,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:49,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 05:14:49,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527199612] [2020-10-14 05:14:49,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 05:14:49,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:49,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 05:14:49,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:14:49,775 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-14 05:14:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:50,161 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-14 05:14:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 05:14:50,161 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-14 05:14:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:50,163 INFO L225 Difference]: With dead ends: 134 [2020-10-14 05:14:50,163 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:14:50,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:14:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:14:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-14 05:14:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 05:14:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-14 05:14:50,169 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-14 05:14:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:50,169 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-14 05:14:50,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 05:14:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-14 05:14:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:14:50,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:50,170 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:50,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:14:50,171 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash -850045649, now seen corresponding path program 57 times [2020-10-14 05:14:50,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:50,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042869848] [2020-10-14 05:14:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:53,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:53,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:14:53,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:53,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-14 05:14:53,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:53,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:53,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 05:14:53,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:53,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 05:14:53,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:14:55,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:14:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:55,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:55,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:55,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:14:55,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:14:55,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:55,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:14:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:14:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:14:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:14:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:14:55,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042869848] [2020-10-14 05:14:55,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:14:55,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 05:14:55,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872714233] [2020-10-14 05:14:55,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 05:14:55,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:14:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 05:14:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:14:55,235 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-14 05:14:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:14:55,508 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-14 05:14:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 05:14:55,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-14 05:14:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:14:55,510 INFO L225 Difference]: With dead ends: 136 [2020-10-14 05:14:55,511 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:14:55,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:14:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:14:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 05:14:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:14:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-14 05:14:55,516 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-14 05:14:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:14:55,517 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-14 05:14:55,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 05:14:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-14 05:14:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:14:55,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:14:55,518 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:14:55,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:14:55,518 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:14:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:14:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1690804143, now seen corresponding path program 58 times [2020-10-14 05:14:55,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:14:55,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258761137] [2020-10-14 05:14:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:14:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:14:55,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:14:58,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:14:58,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:14:58,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:14:58,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-14 05:14:58,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:14:58,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:14:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 05:14:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:14:58,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 05:14:58,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:00,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:00,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:00,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:00,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:00,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:00,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:00,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258761137] [2020-10-14 05:15:00,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:00,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 05:15:00,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302495851] [2020-10-14 05:15:00,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 05:15:00,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 05:15:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:15:00,753 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-14 05:15:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:01,152 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-14 05:15:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 05:15:01,153 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-14 05:15:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:01,154 INFO L225 Difference]: With dead ends: 138 [2020-10-14 05:15:01,155 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 05:15:01,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:15:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 05:15:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-14 05:15:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:15:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-14 05:15:01,160 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-14 05:15:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:01,160 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-14 05:15:01,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 05:15:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-14 05:15:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:15:01,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:01,161 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:01,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:15:01,161 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2089102067, now seen corresponding path program 59 times [2020-10-14 05:15:01,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:01,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992254699] [2020-10-14 05:15:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:04,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:04,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:15:04,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:04,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3397 [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 05:15:04,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:06,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:06,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:06,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:06,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:06,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:06,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:06,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:06,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992254699] [2020-10-14 05:15:06,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:06,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 05:15:06,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918117246] [2020-10-14 05:15:06,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 05:15:06,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 05:15:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:15:06,700 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-14 05:15:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:07,088 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-14 05:15:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 05:15:07,089 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-14 05:15:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:07,090 INFO L225 Difference]: With dead ends: 140 [2020-10-14 05:15:07,091 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:15:07,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:15:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:15:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 05:15:07,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 05:15:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-14 05:15:07,095 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-14 05:15:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:07,095 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-14 05:15:07,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 05:15:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-14 05:15:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:15:07,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:07,096 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:07,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:15:07,097 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1036637461, now seen corresponding path program 60 times [2020-10-14 05:15:07,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:07,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872352371] [2020-10-14 05:15:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:07,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:10,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3753 [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 05:15:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:10,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 05:15:10,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:13,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:13,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:13,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:13,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872352371] [2020-10-14 05:15:13,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:13,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 05:15:13,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133698469] [2020-10-14 05:15:13,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 05:15:13,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 05:15:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 05:15:13,078 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-14 05:15:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:13,366 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-10-14 05:15:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 05:15:13,367 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-14 05:15:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:13,368 INFO L225 Difference]: With dead ends: 142 [2020-10-14 05:15:13,368 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:15:13,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 05:15:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:15:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-14 05:15:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:15:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-14 05:15:13,373 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-14 05:15:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:13,373 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-14 05:15:13,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 05:15:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-14 05:15:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:15:13,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:13,374 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:13,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:15:13,374 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:13,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1064534345, now seen corresponding path program 61 times [2020-10-14 05:15:13,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:13,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289838766] [2020-10-14 05:15:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:13,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:16,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:16,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3594 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 05:15:16,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:19,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:19,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:19,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:19,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:19,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:19,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:19,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:19,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:19,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:19,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289838766] [2020-10-14 05:15:19,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:19,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 05:15:19,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504415442] [2020-10-14 05:15:19,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 05:15:19,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:19,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 05:15:19,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 05:15:19,252 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-14 05:15:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:19,682 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-10-14 05:15:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 05:15:19,683 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-14 05:15:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:19,684 INFO L225 Difference]: With dead ends: 144 [2020-10-14 05:15:19,684 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 05:15:19,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 05:15:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 05:15:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-14 05:15:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 05:15:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-14 05:15:19,689 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-14 05:15:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:19,689 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-14 05:15:19,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 05:15:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-14 05:15:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:15:19,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:19,690 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:19,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:15:19,691 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1656010791, now seen corresponding path program 62 times [2020-10-14 05:15:19,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:19,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88959895] [2020-10-14 05:15:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:19,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:23,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:23,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3741 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 05:15:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:25,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:25,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:25,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:25,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:15:25,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:25,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:25,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88959895] [2020-10-14 05:15:25,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:25,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 05:15:25,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213044628] [2020-10-14 05:15:25,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 05:15:25,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 05:15:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 05:15:25,811 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-14 05:15:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:26,245 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-10-14 05:15:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 05:15:26,245 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-14 05:15:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:26,247 INFO L225 Difference]: With dead ends: 146 [2020-10-14 05:15:26,247 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:15:26,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 05:15:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:15:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 05:15:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:15:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-14 05:15:26,251 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-14 05:15:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:26,251 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-14 05:15:26,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 05:15:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-14 05:15:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:15:26,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:26,252 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:26,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:15:26,252 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1165774971, now seen corresponding path program 63 times [2020-10-14 05:15:26,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:26,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402022673] [2020-10-14 05:15:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:26,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3918 [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 05:15:30,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:32,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:32,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:32,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:32,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402022673] [2020-10-14 05:15:32,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:32,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 05:15:32,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045872080] [2020-10-14 05:15:32,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 05:15:32,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:32,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 05:15:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 05:15:32,635 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-14 05:15:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:33,095 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-10-14 05:15:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 05:15:33,095 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-14 05:15:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:33,097 INFO L225 Difference]: With dead ends: 148 [2020-10-14 05:15:33,097 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 05:15:33,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 05:15:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 05:15:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-14 05:15:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:15:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-14 05:15:33,102 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-14 05:15:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:33,102 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-14 05:15:33,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 05:15:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-14 05:15:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:15:33,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:33,103 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:33,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:15:33,104 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:33,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1517438819, now seen corresponding path program 64 times [2020-10-14 05:15:33,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:33,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592438787] [2020-10-14 05:15:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:33,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:37,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:37,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:15:37,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:37,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4173 [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 05:15:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:39,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:39,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:39,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:39,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:39,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:39,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:39,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:39,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:39,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:39,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:39,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:39,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:39,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592438787] [2020-10-14 05:15:39,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:39,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 05:15:39,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336945681] [2020-10-14 05:15:39,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 05:15:39,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:39,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 05:15:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 05:15:39,828 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-14 05:15:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:40,296 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-10-14 05:15:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 05:15:40,297 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-14 05:15:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:40,299 INFO L225 Difference]: With dead ends: 150 [2020-10-14 05:15:40,299 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:15:40,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 05:15:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:15:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 05:15:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 05:15:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-14 05:15:40,303 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-14 05:15:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:40,303 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-14 05:15:40,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 05:15:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-14 05:15:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:15:40,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:40,304 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:40,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:15:40,305 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1189453887, now seen corresponding path program 65 times [2020-10-14 05:15:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:40,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245165452] [2020-10-14 05:15:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:40,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4260 [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:44,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-14 05:15:44,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:44,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 05:15:44,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:47,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:47,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:47,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:47,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:47,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:47,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:47,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245165452] [2020-10-14 05:15:47,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:47,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-14 05:15:47,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210420254] [2020-10-14 05:15:47,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-14 05:15:47,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-14 05:15:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:15:47,214 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-14 05:15:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:47,676 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-10-14 05:15:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 05:15:47,677 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-14 05:15:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:47,678 INFO L225 Difference]: With dead ends: 152 [2020-10-14 05:15:47,678 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 05:15:47,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:15:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 05:15:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-14 05:15:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 05:15:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-14 05:15:47,684 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-14 05:15:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:47,684 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-14 05:15:47,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-14 05:15:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-14 05:15:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:15:47,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:47,685 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:47,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:15:47,685 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -236837023, now seen corresponding path program 66 times [2020-10-14 05:15:47,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:47,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150217013] [2020-10-14 05:15:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:52,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4455 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 05:15:52,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:54,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:54,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:15:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:54,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150217013] [2020-10-14 05:15:54,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:54,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 05:15:54,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754033702] [2020-10-14 05:15:54,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 05:15:54,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 05:15:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 05:15:54,849 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-14 05:15:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:55,313 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-10-14 05:15:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-14 05:15:55,314 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-14 05:15:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:55,315 INFO L225 Difference]: With dead ends: 154 [2020-10-14 05:15:55,315 INFO L226 Difference]: Without dead ends: 148 [2020-10-14 05:15:55,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 05:15:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-14 05:15:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-14 05:15:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:15:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-14 05:15:55,319 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-14 05:15:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:55,319 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-14 05:15:55,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 05:15:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-14 05:15:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:15:55,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:55,320 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:55,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:15:55,321 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:55,321 INFO L82 PathProgramCache]: Analyzing trace with hash -807834109, now seen corresponding path program 67 times [2020-10-14 05:15:55,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:55,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415367987] [2020-10-14 05:15:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:00,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:00,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:16:00,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:00,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4824 [2020-10-14 05:16:00,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:00,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-14 05:16:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:00,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-14 05:16:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:02,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:02,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:02,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:02,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:02,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:02,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:02,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415367987] [2020-10-14 05:16:02,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:02,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-14 05:16:02,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423803915] [2020-10-14 05:16:02,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-14 05:16:02,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-14 05:16:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:16:02,952 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-14 05:16:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:03,445 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-10-14 05:16:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 05:16:03,446 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-14 05:16:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:03,447 INFO L225 Difference]: With dead ends: 156 [2020-10-14 05:16:03,447 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 05:16:03,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:16:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 05:16:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 05:16:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:16:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-14 05:16:03,451 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-14 05:16:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:03,451 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-14 05:16:03,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-14 05:16:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-14 05:16:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:16:03,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:03,452 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:03,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:16:03,453 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash 219780133, now seen corresponding path program 68 times [2020-10-14 05:16:03,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:03,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966460462] [2020-10-14 05:16:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:08,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:08,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:16:08,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:08,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4866 [2020-10-14 05:16:08,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:08,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 05:16:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:08,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 05:16:08,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:11,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:11,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:11,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:11,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:11,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966460462] [2020-10-14 05:16:11,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:11,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 05:16:11,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323057891] [2020-10-14 05:16:11,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 05:16:11,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 05:16:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 05:16:11,214 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-14 05:16:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:11,714 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-10-14 05:16:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 05:16:11,715 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-14 05:16:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:11,716 INFO L225 Difference]: With dead ends: 158 [2020-10-14 05:16:11,716 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 05:16:11,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 05:16:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 05:16:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 05:16:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:16:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-14 05:16:11,721 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-14 05:16:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:11,721 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-14 05:16:11,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-14 05:16:11,721 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-14 05:16:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:16:11,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:11,722 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:11,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:16:11,723 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash -85411385, now seen corresponding path program 69 times [2020-10-14 05:16:11,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:11,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790093182] [2020-10-14 05:16:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:11,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:16,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:16,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:16:16,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 05:16:16,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:16,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 05:16:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:16,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 05:16:16,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:19,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:19,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:19,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:19,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:19,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790093182] [2020-10-14 05:16:19,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:19,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 05:16:19,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778073759] [2020-10-14 05:16:19,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 05:16:19,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 05:16:19,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:16:19,779 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-14 05:16:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:20,111 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-10-14 05:16:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-14 05:16:20,112 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-14 05:16:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:20,113 INFO L225 Difference]: With dead ends: 160 [2020-10-14 05:16:20,113 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 05:16:20,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:16:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 05:16:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-14 05:16:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 05:16:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-14 05:16:20,118 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-14 05:16:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:20,118 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-14 05:16:20,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 05:16:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-14 05:16:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 05:16:20,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:20,119 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:20,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:16:20,119 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:20,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1316684055, now seen corresponding path program 70 times [2020-10-14 05:16:20,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:20,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676868266] [2020-10-14 05:16:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:20,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:25,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-14 05:16:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:25,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 05:16:25,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:28,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:28,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:28,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:28,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:28,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676868266] [2020-10-14 05:16:28,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:28,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-14 05:16:28,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84125922] [2020-10-14 05:16:28,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-14 05:16:28,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-14 05:16:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:16:28,233 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-14 05:16:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:28,627 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-10-14 05:16:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 05:16:28,628 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-14 05:16:28,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:28,629 INFO L225 Difference]: With dead ends: 162 [2020-10-14 05:16:28,629 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:16:28,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:16:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:16:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 05:16:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 05:16:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-14 05:16:28,634 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-14 05:16:28,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:28,634 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-14 05:16:28,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-14 05:16:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-14 05:16:28,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 05:16:28,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:28,635 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:28,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:16:28,635 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash 841253771, now seen corresponding path program 71 times [2020-10-14 05:16:28,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:28,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837340270] [2020-10-14 05:16:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:28,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:33,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:33,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 05:16:33,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:33,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 05:16:33,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:36,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:36,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:36,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:36,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:36,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:36,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:36,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:36,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:36,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:36,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:36,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:36,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:36,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837340270] [2020-10-14 05:16:36,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:36,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-14 05:16:36,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90787416] [2020-10-14 05:16:36,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-14 05:16:36,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:36,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-14 05:16:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 05:16:36,783 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-14 05:16:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:37,328 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-10-14 05:16:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-14 05:16:37,329 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-14 05:16:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:37,330 INFO L225 Difference]: With dead ends: 164 [2020-10-14 05:16:37,330 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 05:16:37,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 05:16:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 05:16:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-14 05:16:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:16:37,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-14 05:16:37,336 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-14 05:16:37,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:37,336 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-14 05:16:37,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-14 05:16:37,337 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-14 05:16:37,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 05:16:37,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:37,338 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:37,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:16:37,338 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash 150300589, now seen corresponding path program 72 times [2020-10-14 05:16:37,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:37,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954058849] [2020-10-14 05:16:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:37,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 05:16:42,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:45,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:45,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:45,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:45,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:45,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:45,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:45,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:45,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:45,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:45,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:45,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954058849] [2020-10-14 05:16:45,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:45,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-14 05:16:45,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094425261] [2020-10-14 05:16:45,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-14 05:16:45,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-14 05:16:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 05:16:45,675 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-14 05:16:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:46,222 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-10-14 05:16:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-14 05:16:46,222 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-14 05:16:46,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:46,224 INFO L225 Difference]: With dead ends: 166 [2020-10-14 05:16:46,224 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:16:46,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2020-10-14 05:16:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:16:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-14 05:16:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 05:16:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-14 05:16:46,228 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-14 05:16:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:46,229 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-14 05:16:46,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-14 05:16:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-14 05:16:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 05:16:46,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:46,230 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:46,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 05:16:46,230 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:46,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1864223567, now seen corresponding path program 73 times [2020-10-14 05:16:46,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:46,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568110360] [2020-10-14 05:16:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:46,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:51,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 05:16:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:54,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:54,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:54,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:16:54,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:54,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:54,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:54,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:54,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:54,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:54,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:54,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:16:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:54,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568110360] [2020-10-14 05:16:54,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:54,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-14 05:16:54,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784838058] [2020-10-14 05:16:54,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-14 05:16:54,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:54,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-14 05:16:54,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 05:16:54,680 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-14 05:16:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:55,184 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-10-14 05:16:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-14 05:16:55,185 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-14 05:16:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:55,187 INFO L225 Difference]: With dead ends: 168 [2020-10-14 05:16:55,187 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 05:16:55,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2020-10-14 05:16:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 05:16:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-14 05:16:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 05:16:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-14 05:16:55,192 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-14 05:16:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:55,192 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-14 05:16:55,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-14 05:16:55,192 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-14 05:16:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-14 05:16:55,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:55,193 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:55,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 05:16:55,193 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -323236239, now seen corresponding path program 74 times [2020-10-14 05:16:55,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:55,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410378066] [2020-10-14 05:16:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:55,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:00,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:00,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-14 05:17:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 05:17:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:03,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:17:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:17:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:17:03,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:17:03,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:17:03,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:17:03,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:17:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:17:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:17:03,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410378066] [2020-10-14 05:17:03,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:17:03,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-14 05:17:03,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362814026] [2020-10-14 05:17:03,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-14 05:17:03,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:17:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-14 05:17:03,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2020-10-14 05:17:03,735 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states.