/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-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:20:03,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:20:03,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:20:03,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:20:03,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:20:03,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:20:03,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:20:03,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:20:03,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:20:03,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:20:03,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:20:03,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:20:03,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:20:03,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:20:03,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:20:03,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:20:03,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:20:03,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:20:03,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:20:03,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:20:03,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:20:03,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:20:03,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:20:03,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:20:03,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:20:03,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:20:03,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:20:03,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:20:03,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:20:03,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:20:03,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:20:03,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:20:03,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:20:03,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:20:03,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:20:03,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:20:03,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:20:03,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:20:03,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:20:03,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:20:03,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:20:03,314 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 05:20:03,336 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:20:03,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:20:03,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:20:03,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:20:03,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:20:03,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:20:03,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:20:03,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:20:03,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:20:03,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:20:03,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:20:03,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:20:03,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:20:03,340 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:20:03,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:20:03,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:20:03,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:20:03,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:20:03,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:20:03,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:20:03,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:20:03,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:20:03,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:20:03,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:20:03,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:20:03,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:20:03,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:20:03,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:20:03,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:20:03,343 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 05:20:03,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:20:03,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:20:03,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:20:03,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:20:03,652 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:20:03,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-14 05:20:03,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5878b216d/ab41650925f5469898c2774f9fb41766/FLAG797154e7c [2020-10-14 05:20:04,155 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:20:04,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2020-10-14 05:20:04,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5878b216d/ab41650925f5469898c2774f9fb41766/FLAG797154e7c [2020-10-14 05:20:04,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5878b216d/ab41650925f5469898c2774f9fb41766 [2020-10-14 05:20:04,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:20:04,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:20:04,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:04,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:20:04,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:20:04,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b3ac5cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04, skipping insertion in model container [2020-10-14 05:20:04,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:20:04,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:20:04,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:04,715 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:20:04,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:04,744 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:20:04,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04 WrapperNode [2020-10-14 05:20:04,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:04,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:20:04,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:20:04,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:20:04,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (1/1) ... [2020-10-14 05:20:04,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:20:04,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:20:04,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:20:04,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:20:04,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (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 05:20:04,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:20:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:20:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:20:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:20:04,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:20:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:20:04,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:20:04,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:20:05,143 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:20:05,144 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:20:05,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:05 BoogieIcfgContainer [2020-10-14 05:20:05,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:20:05,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:20:05,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:20:05,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:20:05,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:20:04" (1/3) ... [2020-10-14 05:20:05,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e50b559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:05, skipping insertion in model container [2020-10-14 05:20:05,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:04" (2/3) ... [2020-10-14 05:20:05,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e50b559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:05, skipping insertion in model container [2020-10-14 05:20:05,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:05" (3/3) ... [2020-10-14 05:20:05,157 INFO L109 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2020-10-14 05:20:05,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:20:05,175 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:20:05,190 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:20:05,252 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:20:05,252 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:20:05,253 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:20:05,253 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:20:05,253 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:20:05,253 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:20:05,254 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:20:05,254 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:20:05,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 05:20:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:20:05,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:05,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:05,283 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:05,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:05,300 INFO L82 PathProgramCache]: Analyzing trace with hash -516899263, now seen corresponding path program 1 times [2020-10-14 05:20:05,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:05,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539346392] [2020-10-14 05:20:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:05,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:20:05,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:20:05,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-14 05:20:05,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:05,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:05,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:05,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 05:20:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:05,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 05:20:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:20:05,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:05,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:05,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:05,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:05,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:20:05,632 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 05:20:05,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539346392] [2020-10-14 05:20:05,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:05,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:20:05,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337662620] [2020-10-14 05:20:05,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:20:05,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:05,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:20:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:20:05,682 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-10-14 05:20:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:05,722 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-10-14 05:20:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:20:05,725 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-14 05:20:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:05,736 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:20:05,736 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:20:05,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:20:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:20:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:20:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:20:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:20:05,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:20:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:05,789 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:20:05,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:20:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:20:05,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:20:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:05,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:05,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:20:05,792 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1990866618, now seen corresponding path program 1 times [2020-10-14 05:20:05,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:05,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851504766] [2020-10-14 05:20:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:05,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:05,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:05,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:20:05,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:05,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 05:20:05,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:05,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:20:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:05,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:20:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:06,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:06,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:06,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:20:06,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:06,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:06,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:06,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:06,022 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 05:20:06,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851504766] [2020-10-14 05:20:06,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:06,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:20:06,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157850731] [2020-10-14 05:20:06,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:20:06,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:20:06,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:06,027 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:20:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:06,093 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-14 05:20:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:20:06,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:20:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:06,095 INFO L225 Difference]: With dead ends: 28 [2020-10-14 05:20:06,095 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:20:06,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:20:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:20:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:20:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:20:06,102 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-10-14 05:20:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:06,103 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:20:06,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:20:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:20:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:20:06,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:06,104 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:06,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:20:06,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2007463969, now seen corresponding path program 1 times [2020-10-14 05:20:06,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:06,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837273485] [2020-10-14 05:20:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:20:06,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:06,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 05:20:06,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:20:06,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:20:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:06,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:06,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:20:06,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:06,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:06,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837273485] [2020-10-14 05:20:06,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:06,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:20:06,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755325905] [2020-10-14 05:20:06,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:20:06,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:20:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:06,340 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-10-14 05:20:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:06,451 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-14 05:20:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:20:06,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-14 05:20:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:06,453 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:20:06,455 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:20:06,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:20:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-14 05:20:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:20:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 05:20:06,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-14 05:20:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:06,465 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 05:20:06,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:20:06,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 05:20:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:20:06,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:06,468 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:06,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:20:06,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash 407428156, now seen corresponding path program 2 times [2020-10-14 05:20:06,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:06,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130091681] [2020-10-14 05:20:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:20:06,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-14 05:20:06,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:20:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:20:06,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:20:06,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:06,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:06,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:06,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:06,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:06,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:06,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130091681] [2020-10-14 05:20:06,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:06,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:20:06,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634850905] [2020-10-14 05:20:06,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:20:06,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:20:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:06,711 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-14 05:20:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:06,813 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-14 05:20:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:20:06,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 05:20:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:06,819 INFO L225 Difference]: With dead ends: 42 [2020-10-14 05:20:06,820 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:20:06,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:20:06,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-10-14 05:20:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:20:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:20:06,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2020-10-14 05:20:06,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:06,831 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:20:06,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:20:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:20:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:20:06,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:06,833 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:06,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:20:06,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:06,834 INFO L82 PathProgramCache]: Analyzing trace with hash 371303831, now seen corresponding path program 3 times [2020-10-14 05:20:06,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:06,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22551790] [2020-10-14 05:20:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:06,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:06,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:06,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:20:06,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:06,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-14 05:20:06,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:06,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:06,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:20:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:06,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:20:06,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:07,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:07,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:07,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:07,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22551790] [2020-10-14 05:20:07,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:07,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:20:07,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838924572] [2020-10-14 05:20:07,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:20:07,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:20:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:07,012 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-14 05:20:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:07,081 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-14 05:20:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:20:07,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-14 05:20:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:07,083 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:20:07,083 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:20:07,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:20:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-14 05:20:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 05:20:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-14 05:20:07,090 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-14 05:20:07,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:07,090 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-14 05:20:07,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:20:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-14 05:20:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:20:07,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:07,091 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:07,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:20:07,092 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash 15565874, now seen corresponding path program 4 times [2020-10-14 05:20:07,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:07,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601919130] [2020-10-14 05:20:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:20:07,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:07,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-14 05:20:07,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:20:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:20:07,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:07,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:07,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:07,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:07,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:07,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:07,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601919130] [2020-10-14 05:20:07,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:07,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:20:07,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717383315] [2020-10-14 05:20:07,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:20:07,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:20:07,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:07,261 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-14 05:20:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:07,363 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-14 05:20:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:20:07,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-14 05:20:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:07,365 INFO L225 Difference]: With dead ends: 52 [2020-10-14 05:20:07,365 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:20:07,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:20:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-10-14 05:20:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:20:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-14 05:20:07,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2020-10-14 05:20:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:07,373 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-14 05:20:07,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:20:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-14 05:20:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:20:07,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:07,375 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:07,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:20:07,376 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1748772877, now seen corresponding path program 5 times [2020-10-14 05:20:07,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:07,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192242999] [2020-10-14 05:20:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:20:07,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:07,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 05:20:07,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:20:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:07,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:20:07,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:07,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:07,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:07,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:07,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:07,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:07,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:07,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192242999] [2020-10-14 05:20:07,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:07,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:20:07,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132073788] [2020-10-14 05:20:07,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:20:07,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:07,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:20:07,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:07,676 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 10 states. [2020-10-14 05:20:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:07,776 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-14 05:20:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:20:07,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-14 05:20:07,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:07,778 INFO L225 Difference]: With dead ends: 57 [2020-10-14 05:20:07,778 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:20:07,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:20:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-14 05:20:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:20:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-14 05:20:07,785 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2020-10-14 05:20:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:07,785 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-14 05:20:07,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:20:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-14 05:20:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:20:07,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:07,787 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:07,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:20:07,787 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash 913391912, now seen corresponding path program 6 times [2020-10-14 05:20:07,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:07,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249450853] [2020-10-14 05:20:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:07,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:07,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:20:07,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:07,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 05:20:07,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:07,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:20:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:07,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:20:07,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:08,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:08,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:08,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:08,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:08,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:08,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:08,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:08,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:08,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:08,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:08,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249450853] [2020-10-14 05:20:08,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:08,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:20:08,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829297257] [2020-10-14 05:20:08,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:20:08,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:20:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:08,081 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 11 states. [2020-10-14 05:20:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:08,187 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-14 05:20:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:20:08,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-14 05:20:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:08,189 INFO L225 Difference]: With dead ends: 62 [2020-10-14 05:20:08,189 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:20:08,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:20:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-14 05:20:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:20:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-10-14 05:20:08,195 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 28 [2020-10-14 05:20:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:08,196 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-10-14 05:20:08,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:20:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-10-14 05:20:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:20:08,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:08,197 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:08,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:20:08,198 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1271168899, now seen corresponding path program 7 times [2020-10-14 05:20:08,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:08,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504480338] [2020-10-14 05:20:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:08,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:08,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:20:08,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:08,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 05:20:08,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:08,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:08,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:20:08,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:08,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:20:08,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:08,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:08,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:08,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:08,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:08,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:08,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:08,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:08,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504480338] [2020-10-14 05:20:08,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:08,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:20:08,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418812984] [2020-10-14 05:20:08,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:20:08,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:20:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:08,524 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2020-10-14 05:20:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:08,644 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2020-10-14 05:20:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:20:08,645 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 05:20:08,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:08,646 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:20:08,646 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:20:08,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:20:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-14 05:20:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:20:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-10-14 05:20:08,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 30 [2020-10-14 05:20:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:08,654 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-10-14 05:20:08,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:20:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-10-14 05:20:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:20:08,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:08,655 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:08,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:20:08,656 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1497469726, now seen corresponding path program 8 times [2020-10-14 05:20:08,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:08,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105819885] [2020-10-14 05:20:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:08,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:08,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:08,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:20:08,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:08,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-14 05:20:08,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:08,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:20:08,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:08,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:20:08,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:09,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:09,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:09,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:09,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:09,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:09,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:09,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:09,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105819885] [2020-10-14 05:20:09,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:09,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:20:09,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457535295] [2020-10-14 05:20:09,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:20:09,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:09,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:20:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:09,086 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 13 states. [2020-10-14 05:20:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:09,201 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-14 05:20:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:20:09,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 05:20:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:09,204 INFO L225 Difference]: With dead ends: 72 [2020-10-14 05:20:09,204 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:20:09,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:20:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-14 05:20:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:20:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-14 05:20:09,213 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 32 [2020-10-14 05:20:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:09,214 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-14 05:20:09,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:20:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-14 05:20:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:20:09,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:09,217 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:09,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:20:09,218 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:09,219 INFO L82 PathProgramCache]: Analyzing trace with hash -70767623, now seen corresponding path program 9 times [2020-10-14 05:20:09,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:09,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910516781] [2020-10-14 05:20:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:20:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-14 05:20:09,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:20:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:09,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:09,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:09,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:09,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:09,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:09,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910516781] [2020-10-14 05:20:09,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:09,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:20:09,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573053648] [2020-10-14 05:20:09,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:20:09,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:09,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:20:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:09,777 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 14 states. [2020-10-14 05:20:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:09,895 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-14 05:20:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:20:09,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-14 05:20:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:09,897 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:20:09,897 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:20:09,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:20:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-14 05:20:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 05:20:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 05:20:09,903 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 34 [2020-10-14 05:20:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:09,903 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 05:20:09,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:20:09,903 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 05:20:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:20:09,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:09,905 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:09,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:20:09,905 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:09,905 INFO L82 PathProgramCache]: Analyzing trace with hash 386660884, now seen corresponding path program 10 times [2020-10-14 05:20:09,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:09,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472579002] [2020-10-14 05:20:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:09,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:20:10,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:10,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-14 05:20:10,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:20:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:10,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:20:10,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:10,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:10,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:10,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:10,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472579002] [2020-10-14 05:20:10,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:10,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:20:10,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665643697] [2020-10-14 05:20:10,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:20:10,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:20:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:10,438 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 15 states. [2020-10-14 05:20:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:10,554 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-14 05:20:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:20:10,555 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-14 05:20:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:10,556 INFO L225 Difference]: With dead ends: 82 [2020-10-14 05:20:10,556 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 05:20:10,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 05:20:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-10-14 05:20:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:20:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-14 05:20:10,561 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 36 [2020-10-14 05:20:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:10,562 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-14 05:20:10,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:20:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-14 05:20:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:20:10,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:10,563 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:10,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:20:10,564 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1888791919, now seen corresponding path program 11 times [2020-10-14 05:20:10,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:10,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327265686] [2020-10-14 05:20:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:10,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:10,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:20:10,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:10,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-14 05:20:10,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:10,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:20:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:10,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:20:10,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:11,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:11,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:11,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:11,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:11,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327265686] [2020-10-14 05:20:11,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:11,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:20:11,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275279443] [2020-10-14 05:20:11,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:20:11,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:11,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:20:11,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:11,015 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 16 states. [2020-10-14 05:20:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:11,138 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-10-14 05:20:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:20:11,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 05:20:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:11,139 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:20:11,139 INFO L226 Difference]: Without dead ends: 79 [2020-10-14 05:20:11,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-14 05:20:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2020-10-14 05:20:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:20:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-14 05:20:11,145 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 38 [2020-10-14 05:20:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:11,145 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-14 05:20:11,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:20:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-14 05:20:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:20:11,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:11,146 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:11,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:20:11,146 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:11,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:11,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1967262198, now seen corresponding path program 12 times [2020-10-14 05:20:11,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:11,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800254913] [2020-10-14 05:20:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:20:11,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:11,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-14 05:20:11,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:20:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:11,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:20:11,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:11,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:11,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:11,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:11,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:11,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:11,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:11,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:11,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:11,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:11,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800254913] [2020-10-14 05:20:11,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:11,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:20:11,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095798073] [2020-10-14 05:20:11,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:20:11,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:20:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:11,853 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 17 states. [2020-10-14 05:20:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:11,997 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-14 05:20:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:20:11,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-14 05:20:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:11,999 INFO L225 Difference]: With dead ends: 92 [2020-10-14 05:20:11,999 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:20:12,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:20:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-10-14 05:20:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:20:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-14 05:20:12,004 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 40 [2020-10-14 05:20:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:12,005 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-14 05:20:12,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:20:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-14 05:20:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:20:12,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:12,006 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:12,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:20:12,006 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1078492187, now seen corresponding path program 13 times [2020-10-14 05:20:12,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:12,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663361245] [2020-10-14 05:20:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:20:12,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:12,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 05:20:12,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:20:12,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:12,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:20:12,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:12,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:12,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:12,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:12,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:12,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:12,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:12,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:12,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:12,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:12,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663361245] [2020-10-14 05:20:12,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:20:12,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287837762] [2020-10-14 05:20:12,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:20:12,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:20:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:12,857 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 18 states. [2020-10-14 05:20:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:13,009 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-14 05:20:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:20:13,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-14 05:20:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:13,010 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:20:13,011 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:20:13,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:20:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:20:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2020-10-14 05:20:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 05:20:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2020-10-14 05:20:13,016 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 42 [2020-10-14 05:20:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:13,016 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2020-10-14 05:20:13,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:20:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2020-10-14 05:20:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:20:13,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:13,017 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:13,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:20:13,018 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:13,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1669003520, now seen corresponding path program 14 times [2020-10-14 05:20:13,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:13,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106060747] [2020-10-14 05:20:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:13,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:20:13,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:13,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-14 05:20:13,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:20:13,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:13,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:20:13,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:13,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:13,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:13,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:13,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:13,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:13,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:13,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:13,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106060747] [2020-10-14 05:20:13,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:13,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:20:13,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426811745] [2020-10-14 05:20:13,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:20:13,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:20:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:20:13,925 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 19 states. [2020-10-14 05:20:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:14,138 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2020-10-14 05:20:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:20:14,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-14 05:20:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:14,140 INFO L225 Difference]: With dead ends: 102 [2020-10-14 05:20:14,140 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:20:14,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:20:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:20:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-14 05:20:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:20:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-10-14 05:20:14,145 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 44 [2020-10-14 05:20:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:14,146 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-10-14 05:20:14,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:20:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-10-14 05:20:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:20:14,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:14,147 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:14,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:20:14,148 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2080255835, now seen corresponding path program 15 times [2020-10-14 05:20:14,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:14,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976727406] [2020-10-14 05:20:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:14,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:14,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:20:14,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:14,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-14 05:20:14,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:14,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:20:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:20:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:14,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:14,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:14,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:14,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:14,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:14,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:14,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:14,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:14,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:14,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976727406] [2020-10-14 05:20:14,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:14,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:20:14,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146644857] [2020-10-14 05:20:14,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:20:14,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:14,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:20:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:20:14,951 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 20 states. [2020-10-14 05:20:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:15,140 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-14 05:20:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:20:15,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-14 05:20:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:15,142 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:20:15,142 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:20:15,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:20:15,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:20:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-10-14 05:20:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 05:20:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2020-10-14 05:20:15,149 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 46 [2020-10-14 05:20:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:15,150 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2020-10-14 05:20:15,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:20:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2020-10-14 05:20:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:20:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:15,151 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:15,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:20:15,152 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:15,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:15,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1640934646, now seen corresponding path program 16 times [2020-10-14 05:20:15,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:15,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283644491] [2020-10-14 05:20:15,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:15,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:15,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:15,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:20:15,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:15,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 703 [2020-10-14 05:20:15,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:15,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:15,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:20:15,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:15,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:20:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:16,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:16,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:16,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:16,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:16,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:16,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:16,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:16,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:16,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:16,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:16,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:16,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283644491] [2020-10-14 05:20:16,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:16,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:20:16,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683978164] [2020-10-14 05:20:16,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:20:16,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:20:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:20:16,151 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 21 states. [2020-10-14 05:20:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:16,328 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2020-10-14 05:20:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:20:16,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-14 05:20:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:16,329 INFO L225 Difference]: With dead ends: 112 [2020-10-14 05:20:16,330 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 05:20:16,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:20:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 05:20:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-10-14 05:20:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:20:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-14 05:20:16,334 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 48 [2020-10-14 05:20:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:16,335 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-14 05:20:16,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:20:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-14 05:20:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:20:16,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:16,336 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:16,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:20:16,336 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash 360067025, now seen corresponding path program 17 times [2020-10-14 05:20:16,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:16,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810386209] [2020-10-14 05:20:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:16,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:16,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:17,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:17,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:20:17,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:17,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 717 [2020-10-14 05:20:17,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:17,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:20:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:20:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:17,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:17,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:17,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810386209] [2020-10-14 05:20:17,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:17,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:20:17,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021732865] [2020-10-14 05:20:17,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:20:17,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:17,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:20:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:20:17,324 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 22 states. [2020-10-14 05:20:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:17,506 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2020-10-14 05:20:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:20:17,507 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-14 05:20:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:17,508 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:20:17,508 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 05:20:17,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:20:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 05:20:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2020-10-14 05:20:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 05:20:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2020-10-14 05:20:17,513 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 50 [2020-10-14 05:20:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:17,513 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2020-10-14 05:20:17,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:20:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2020-10-14 05:20:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:20:17,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:17,514 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:17,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:20:17,515 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2101897196, now seen corresponding path program 18 times [2020-10-14 05:20:17,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:17,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807493402] [2020-10-14 05:20:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:17,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:18,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:18,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:20:18,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:18,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-14 05:20:18,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:18,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:20:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:18,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:20:18,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:18,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:18,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:18,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:18,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:18,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:18,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:18,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:18,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:18,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:18,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:18,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807493402] [2020-10-14 05:20:18,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:18,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:20:18,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364632763] [2020-10-14 05:20:18,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:20:18,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:18,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:20:18,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:20:18,538 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 23 states. [2020-10-14 05:20:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:18,765 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-14 05:20:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:20:18,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-14 05:20:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:18,766 INFO L225 Difference]: With dead ends: 122 [2020-10-14 05:20:18,766 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 05:20:18,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:20:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 05:20:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-14 05:20:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:20:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-14 05:20:18,770 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 52 [2020-10-14 05:20:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:18,771 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-14 05:20:18,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:20:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-14 05:20:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:20:18,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:18,772 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:18,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:20:18,772 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash 963446087, now seen corresponding path program 19 times [2020-10-14 05:20:18,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:18,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962709781] [2020-10-14 05:20:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:18,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:19,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:19,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:20:19,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 05:20:19,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:19,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:19,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:20:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:19,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:20:19,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:19,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:19,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:19,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:19,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:19,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:19,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:19,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:19,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962709781] [2020-10-14 05:20:19,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:19,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:20:19,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139313978] [2020-10-14 05:20:19,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:20:19,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:20:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:20:19,612 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 24 states. [2020-10-14 05:20:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:19,797 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2020-10-14 05:20:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:20:19,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-14 05:20:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:19,799 INFO L225 Difference]: With dead ends: 127 [2020-10-14 05:20:19,799 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 05:20:19,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:20:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 05:20:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-10-14 05:20:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 05:20:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2020-10-14 05:20:19,805 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 54 [2020-10-14 05:20:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:19,806 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2020-10-14 05:20:19,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:20:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2020-10-14 05:20:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:20:19,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:19,807 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:19,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:20:19,807 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2128590818, now seen corresponding path program 20 times [2020-10-14 05:20:19,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:19,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481778478] [2020-10-14 05:20:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:19,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:20,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:20,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:20,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:20:20,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:20,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:20:20,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:20,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:20,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:20,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:20,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:20,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:20:20,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:20,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:20,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:20,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:20,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481778478] [2020-10-14 05:20:20,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:20,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:20:20,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075908733] [2020-10-14 05:20:20,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:20:20,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:20,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:20:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:20:20,816 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand 25 states. [2020-10-14 05:20:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:21,073 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-10-14 05:20:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:20:21,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 05:20:21,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:21,078 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:20:21,079 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 05:20:21,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:20:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 05:20:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-10-14 05:20:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:20:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-14 05:20:21,088 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 56 [2020-10-14 05:20:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:21,088 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-14 05:20:21,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:20:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-14 05:20:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:20:21,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:21,095 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:21,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:20:21,095 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:21,096 INFO L82 PathProgramCache]: Analyzing trace with hash 846213053, now seen corresponding path program 21 times [2020-10-14 05:20:21,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:21,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992673030] [2020-10-14 05:20:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:21,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:22,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:22,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:20:22,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:22,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 881 [2020-10-14 05:20:22,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:22,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:20:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:20:22,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:22,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:22,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:22,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:22,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:22,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:22,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:22,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:22,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:22,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:22,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:22,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992673030] [2020-10-14 05:20:22,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:22,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:20:22,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913940979] [2020-10-14 05:20:22,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:20:22,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:22,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:20:22,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:20:22,451 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 26 states. [2020-10-14 05:20:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:22,668 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2020-10-14 05:20:22,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:20:22,669 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-14 05:20:22,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:22,670 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:20:22,670 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:20:22,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:20:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:20:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-10-14 05:20:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 05:20:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2020-10-14 05:20:22,677 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 58 [2020-10-14 05:20:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:22,677 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2020-10-14 05:20:22,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:20:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2020-10-14 05:20:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:20:22,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:22,681 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:22,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:20:22,681 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1136794840, now seen corresponding path program 22 times [2020-10-14 05:20:22,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:22,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285433899] [2020-10-14 05:20:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:22,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:20:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1111 [2020-10-14 05:20:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:23,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:20:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:20:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:24,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:24,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:24,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:24,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:24,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:24,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:24,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:24,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:24,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:24,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:24,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:24,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:24,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285433899] [2020-10-14 05:20:24,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:24,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:20:24,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972414589] [2020-10-14 05:20:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:20:24,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:20:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:20:24,204 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 27 states. [2020-10-14 05:20:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:24,443 INFO L93 Difference]: Finished difference Result 142 states and 166 transitions. [2020-10-14 05:20:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:20:24,444 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 05:20:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:24,446 INFO L225 Difference]: With dead ends: 142 [2020-10-14 05:20:24,446 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:20:24,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:20:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:20:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2020-10-14 05:20:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:20:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-14 05:20:24,452 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 60 [2020-10-14 05:20:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:24,453 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-14 05:20:24,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:20:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-14 05:20:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:20:24,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:24,454 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:24,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:20:24,454 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1213017907, now seen corresponding path program 23 times [2020-10-14 05:20:24,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:24,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161515383] [2020-10-14 05:20:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:24,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:24,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:20:24,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:24,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-10-14 05:20:24,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:24,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:20:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:24,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:20:24,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:25,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:25,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:25,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:25,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:25,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:25,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:25,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:25,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:25,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:25,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:25,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:25,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:25,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161515383] [2020-10-14 05:20:25,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:25,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:20:25,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421480814] [2020-10-14 05:20:25,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:20:25,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:25,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:20:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:20:25,419 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 28 states. [2020-10-14 05:20:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:25,619 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2020-10-14 05:20:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:20:25,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-14 05:20:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:25,621 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:20:25,621 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:20:25,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:20:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:20:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2020-10-14 05:20:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 05:20:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-10-14 05:20:25,626 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 62 [2020-10-14 05:20:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:25,626 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-10-14 05:20:25,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:20:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-10-14 05:20:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:20:25,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:25,627 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:25,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:20:25,628 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1448941262, now seen corresponding path program 24 times [2020-10-14 05:20:25,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:25,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810692684] [2020-10-14 05:20:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:25,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:25,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:26,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:26,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:20:26,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:27,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:27,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:27,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:27,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:27,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:27,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:27,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810692684] [2020-10-14 05:20:27,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:27,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:20:27,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451675101] [2020-10-14 05:20:27,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:20:27,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:20:27,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:20:27,401 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 29 states. [2020-10-14 05:20:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:27,707 INFO L93 Difference]: Finished difference Result 152 states and 178 transitions. [2020-10-14 05:20:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:20:27,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 05:20:27,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:27,709 INFO L225 Difference]: With dead ends: 152 [2020-10-14 05:20:27,709 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 05:20:27,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:20:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 05:20:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-10-14 05:20:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:20:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-10-14 05:20:27,716 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 64 [2020-10-14 05:20:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:27,716 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-10-14 05:20:27,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:20:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-10-14 05:20:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:20:27,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:27,717 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:27,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:20:27,718 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash 538018729, now seen corresponding path program 25 times [2020-10-14 05:20:27,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:27,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490457807] [2020-10-14 05:20:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:27,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:27,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:28,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:28,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:20:28,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:28,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-14 05:20:28,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:28,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:28,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:20:28,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:28,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:20:28,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:28,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:28,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:28,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:28,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:28,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:28,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:28,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:28,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:28,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490457807] [2020-10-14 05:20:28,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:28,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:20:28,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718375581] [2020-10-14 05:20:28,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:20:28,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:28,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:20:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:20:28,857 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 30 states. [2020-10-14 05:20:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:29,109 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2020-10-14 05:20:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:20:29,111 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-14 05:20:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:29,112 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:20:29,113 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:20:29,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:20:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:20:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2020-10-14 05:20:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-14 05:20:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-10-14 05:20:29,121 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 66 [2020-10-14 05:20:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:29,121 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-10-14 05:20:29,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:20:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-10-14 05:20:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:20:29,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:29,122 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:29,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:20:29,123 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1314792900, now seen corresponding path program 26 times [2020-10-14 05:20:29,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:29,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335829199] [2020-10-14 05:20:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:29,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:29,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:29,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:29,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:20:29,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:29,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-14 05:20:29,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:29,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:20:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:29,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:20:29,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:30,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:30,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:30,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:30,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:30,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:30,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:30,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:30,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:30,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:30,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:30,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335829199] [2020-10-14 05:20:30,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:30,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:20:30,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741546477] [2020-10-14 05:20:30,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:20:30,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:20:30,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:20:30,429 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 31 states. [2020-10-14 05:20:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:30,715 INFO L93 Difference]: Finished difference Result 162 states and 190 transitions. [2020-10-14 05:20:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:20:30,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-14 05:20:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:30,716 INFO L225 Difference]: With dead ends: 162 [2020-10-14 05:20:30,717 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:20:30,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:20:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:20:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2020-10-14 05:20:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:20:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2020-10-14 05:20:30,721 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 68 [2020-10-14 05:20:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:30,721 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2020-10-14 05:20:30,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:20:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2020-10-14 05:20:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:20:30,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:30,722 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:30,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:20:30,723 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash 470461727, now seen corresponding path program 27 times [2020-10-14 05:20:30,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:30,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021017955] [2020-10-14 05:20:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:20:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:31,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:20:31,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:31,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:31,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:31,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:31,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:31,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:31,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:31,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021017955] [2020-10-14 05:20:31,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:31,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:20:31,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552303596] [2020-10-14 05:20:31,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:20:31,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:20:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:20:31,979 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand 32 states. [2020-10-14 05:20:32,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:32,339 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2020-10-14 05:20:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:20:32,340 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-14 05:20:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:32,342 INFO L225 Difference]: With dead ends: 167 [2020-10-14 05:20:32,342 INFO L226 Difference]: Without dead ends: 161 [2020-10-14 05:20:32,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:20:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-14 05:20:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-10-14 05:20:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 05:20:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2020-10-14 05:20:32,349 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 70 [2020-10-14 05:20:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:32,349 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2020-10-14 05:20:32,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:20:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2020-10-14 05:20:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:20:32,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:32,351 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:32,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:20:32,351 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash 817023418, now seen corresponding path program 28 times [2020-10-14 05:20:32,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:32,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547078749] [2020-10-14 05:20:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:32,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:32,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:33,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:33,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:20:33,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-14 05:20:33,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:33,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:33,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:20:33,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:33,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 05:20:33,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:33,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:33,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:33,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:33,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:33,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:33,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:33,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:33,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:33,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:33,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547078749] [2020-10-14 05:20:33,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:33,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:20:33,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006565058] [2020-10-14 05:20:33,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:20:33,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:33,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:20:33,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:20:33,730 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand 33 states. [2020-10-14 05:20:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:33,997 INFO L93 Difference]: Finished difference Result 172 states and 202 transitions. [2020-10-14 05:20:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:20:33,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-14 05:20:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:34,000 INFO L225 Difference]: With dead ends: 172 [2020-10-14 05:20:34,000 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 05:20:34,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:20:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 05:20:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-14 05:20:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 05:20:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2020-10-14 05:20:34,005 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 72 [2020-10-14 05:20:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:34,006 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2020-10-14 05:20:34,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:20:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2020-10-14 05:20:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:20:34,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:34,007 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:34,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:20:34,007 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:34,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1144640619, now seen corresponding path program 29 times [2020-10-14 05:20:34,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:34,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103065444] [2020-10-14 05:20:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:34,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:35,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:20:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 05:20:35,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:35,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:35,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:35,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:35,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:35,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:35,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:35,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:35,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103065444] [2020-10-14 05:20:35,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:35,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:20:35,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194778814] [2020-10-14 05:20:35,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:20:35,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:20:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:20:35,934 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand 34 states. [2020-10-14 05:20:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:36,257 INFO L93 Difference]: Finished difference Result 177 states and 208 transitions. [2020-10-14 05:20:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:20:36,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-14 05:20:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:36,259 INFO L225 Difference]: With dead ends: 177 [2020-10-14 05:20:36,260 INFO L226 Difference]: Without dead ends: 171 [2020-10-14 05:20:36,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:20:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-14 05:20:36,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-10-14 05:20:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-14 05:20:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2020-10-14 05:20:36,265 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 74 [2020-10-14 05:20:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:36,265 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2020-10-14 05:20:36,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:20:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2020-10-14 05:20:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:20:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:36,266 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:36,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:20:36,267 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash -813137232, now seen corresponding path program 30 times [2020-10-14 05:20:36,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:36,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397940827] [2020-10-14 05:20:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:36,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:36,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:36,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:20:36,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:36,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-14 05:20:36,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:36,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:20:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:36,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 05:20:36,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:37,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:37,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397940827] [2020-10-14 05:20:37,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:37,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:20:37,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713458738] [2020-10-14 05:20:37,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:20:37,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:37,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:20:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:20:37,546 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand 35 states. [2020-10-14 05:20:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:37,887 INFO L93 Difference]: Finished difference Result 182 states and 214 transitions. [2020-10-14 05:20:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:20:37,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-14 05:20:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:37,889 INFO L225 Difference]: With dead ends: 182 [2020-10-14 05:20:37,889 INFO L226 Difference]: Without dead ends: 176 [2020-10-14 05:20:37,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:20:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-14 05:20:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2020-10-14 05:20:37,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 05:20:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2020-10-14 05:20:37,896 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 76 [2020-10-14 05:20:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:37,896 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2020-10-14 05:20:37,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:20:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2020-10-14 05:20:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:20:37,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:37,898 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:37,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:20:37,898 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash -65962229, now seen corresponding path program 31 times [2020-10-14 05:20:37,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:37,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033861747] [2020-10-14 05:20:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:37,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:38,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 05:20:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:39,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:39,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:39,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:39,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:39,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:39,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033861747] [2020-10-14 05:20:39,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:39,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:20:39,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844627754] [2020-10-14 05:20:39,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:20:39,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:39,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:20:39,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:20:39,453 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 36 states. [2020-10-14 05:20:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:39,769 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2020-10-14 05:20:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:20:39,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-14 05:20:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:39,771 INFO L225 Difference]: With dead ends: 187 [2020-10-14 05:20:39,772 INFO L226 Difference]: Without dead ends: 181 [2020-10-14 05:20:39,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:20:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-14 05:20:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2020-10-14 05:20:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-14 05:20:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 206 transitions. [2020-10-14 05:20:39,776 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 206 transitions. Word has length 78 [2020-10-14 05:20:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:39,777 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 206 transitions. [2020-10-14 05:20:39,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:20:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 206 transitions. [2020-10-14 05:20:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:20:39,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:39,778 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:39,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:20:39,778 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 709677222, now seen corresponding path program 32 times [2020-10-14 05:20:39,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:39,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914255836] [2020-10-14 05:20:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:39,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:20:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:40,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 05:20:40,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:41,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:41,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:41,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914255836] [2020-10-14 05:20:41,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:41,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:20:41,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203426032] [2020-10-14 05:20:41,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:20:41,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:20:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:20:41,261 INFO L87 Difference]: Start difference. First operand 174 states and 206 transitions. Second operand 37 states. [2020-10-14 05:20:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,594 INFO L93 Difference]: Finished difference Result 192 states and 226 transitions. [2020-10-14 05:20:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:20:41,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-14 05:20:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,596 INFO L225 Difference]: With dead ends: 192 [2020-10-14 05:20:41,596 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 05:20:41,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:20:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 05:20:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2020-10-14 05:20:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 05:20:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2020-10-14 05:20:41,602 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 80 [2020-10-14 05:20:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,603 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2020-10-14 05:20:41,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:20:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2020-10-14 05:20:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:20:41,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,604 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:20:41,604 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1225119871, now seen corresponding path program 33 times [2020-10-14 05:20:41,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686649224] [2020-10-14 05:20:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:20:43,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1424 [2020-10-14 05:20:43,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:20:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 05:20:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:43,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:43,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:43,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:43,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:43,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:43,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686649224] [2020-10-14 05:20:43,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:43,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:20:43,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185622958] [2020-10-14 05:20:43,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:20:43,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:20:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:20:43,795 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand 38 states. [2020-10-14 05:20:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:44,182 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2020-10-14 05:20:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:20:44,182 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-14 05:20:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:44,184 INFO L225 Difference]: With dead ends: 197 [2020-10-14 05:20:44,184 INFO L226 Difference]: Without dead ends: 191 [2020-10-14 05:20:44,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:20:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-14 05:20:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2020-10-14 05:20:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 05:20:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2020-10-14 05:20:44,193 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 82 [2020-10-14 05:20:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:44,193 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2020-10-14 05:20:44,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:20:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2020-10-14 05:20:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:20:44,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:44,194 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:44,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:20:44,195 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -844287076, now seen corresponding path program 34 times [2020-10-14 05:20:44,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:44,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309296380] [2020-10-14 05:20:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:44,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:20:44,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:44,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-14 05:20:44,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:44,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:20:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:44,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 05:20:44,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:45,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:45,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:45,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:45,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:45,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309296380] [2020-10-14 05:20:45,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:45,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:20:45,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513123109] [2020-10-14 05:20:45,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:20:45,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:45,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:20:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:20:45,710 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 39 states. [2020-10-14 05:20:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:46,099 INFO L93 Difference]: Finished difference Result 202 states and 238 transitions. [2020-10-14 05:20:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:20:46,100 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-14 05:20:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:46,102 INFO L225 Difference]: With dead ends: 202 [2020-10-14 05:20:46,102 INFO L226 Difference]: Without dead ends: 196 [2020-10-14 05:20:46,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:20:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-14 05:20:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2020-10-14 05:20:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-14 05:20:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2020-10-14 05:20:46,107 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 84 [2020-10-14 05:20:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:46,108 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2020-10-14 05:20:46,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:20:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2020-10-14 05:20:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:20:46,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:46,109 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:46,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:20:46,109 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:46,110 INFO L82 PathProgramCache]: Analyzing trace with hash 63808759, now seen corresponding path program 35 times [2020-10-14 05:20:46,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:46,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164419251] [2020-10-14 05:20:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:46,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:47,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:47,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:20:47,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 05:20:47,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:48,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:48,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:48,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:48,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:48,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:48,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164419251] [2020-10-14 05:20:48,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:48,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:20:48,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810589587] [2020-10-14 05:20:48,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:20:48,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:20:48,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:20:48,746 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 40 states. [2020-10-14 05:20:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:49,142 INFO L93 Difference]: Finished difference Result 207 states and 244 transitions. [2020-10-14 05:20:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:20:49,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-14 05:20:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:49,145 INFO L225 Difference]: With dead ends: 207 [2020-10-14 05:20:49,145 INFO L226 Difference]: Without dead ends: 201 [2020-10-14 05:20:49,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:20:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-14 05:20:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 194. [2020-10-14 05:20:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-14 05:20:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2020-10-14 05:20:49,151 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 86 [2020-10-14 05:20:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:49,151 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2020-10-14 05:20:49,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:20:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2020-10-14 05:20:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:20:49,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:49,152 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:49,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:20:49,153 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash 865545106, now seen corresponding path program 36 times [2020-10-14 05:20:49,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:49,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576140100] [2020-10-14 05:20:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:49,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:49,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:50,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:50,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 05:20:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:51,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:51,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:51,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:51,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:51,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:51,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:51,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576140100] [2020-10-14 05:20:51,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:51,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:20:51,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503715801] [2020-10-14 05:20:51,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:20:51,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:20:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:20:51,448 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand 41 states. [2020-10-14 05:20:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:51,812 INFO L93 Difference]: Finished difference Result 212 states and 250 transitions. [2020-10-14 05:20:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:20:51,813 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-14 05:20:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:51,815 INFO L225 Difference]: With dead ends: 212 [2020-10-14 05:20:51,815 INFO L226 Difference]: Without dead ends: 206 [2020-10-14 05:20:51,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:20:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-14 05:20:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2020-10-14 05:20:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-14 05:20:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2020-10-14 05:20:51,827 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 88 [2020-10-14 05:20:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:51,827 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2020-10-14 05:20:51,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:20:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2020-10-14 05:20:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:20:51,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:51,829 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:51,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:20:51,829 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1759938707, now seen corresponding path program 37 times [2020-10-14 05:20:51,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:51,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212661470] [2020-10-14 05:20:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:53,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:53,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 05:20:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:54,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:54,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:54,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:54,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:54,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:54,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:54,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:54,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:54,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212661470] [2020-10-14 05:20:54,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:54,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 05:20:54,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516197285] [2020-10-14 05:20:54,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 05:20:54,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 05:20:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:20:54,257 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand 42 states. [2020-10-14 05:20:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:54,638 INFO L93 Difference]: Finished difference Result 217 states and 256 transitions. [2020-10-14 05:20:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 05:20:54,639 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-14 05:20:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:54,641 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:20:54,641 INFO L226 Difference]: Without dead ends: 211 [2020-10-14 05:20:54,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:20:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-14 05:20:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 204. [2020-10-14 05:20:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-14 05:20:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 242 transitions. [2020-10-14 05:20:54,649 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 242 transitions. Word has length 90 [2020-10-14 05:20:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:54,649 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 242 transitions. [2020-10-14 05:20:54,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 05:20:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 242 transitions. [2020-10-14 05:20:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:20:54,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:54,650 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:54,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:20:54,651 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash 590887048, now seen corresponding path program 38 times [2020-10-14 05:20:54,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:54,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863599681] [2020-10-14 05:20:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:54,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:55,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:56,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:56,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:20:56,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:56,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1414 [2020-10-14 05:20:56,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:56,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 05:20:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:56,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 05:20:56,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:57,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:57,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:57,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:57,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:57,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:57,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:57,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:57,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:57,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:57,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:57,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:57,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:57,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863599681] [2020-10-14 05:20:57,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:57,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 05:20:57,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993999097] [2020-10-14 05:20:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 05:20:57,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:57,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 05:20:57,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:20:57,016 INFO L87 Difference]: Start difference. First operand 204 states and 242 transitions. Second operand 43 states. [2020-10-14 05:20:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:57,441 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2020-10-14 05:20:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:20:57,441 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-14 05:20:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:57,444 INFO L225 Difference]: With dead ends: 222 [2020-10-14 05:20:57,444 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 05:20:57,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:20:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 05:20:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2020-10-14 05:20:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-10-14 05:20:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-10-14 05:20:57,451 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 92 [2020-10-14 05:20:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:57,452 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-10-14 05:20:57,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 05:20:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-10-14 05:20:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:20:57,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:57,453 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:57,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:20:57,454 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash 581639907, now seen corresponding path program 39 times [2020-10-14 05:20:57,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:57,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209056367] [2020-10-14 05:20:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:57,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:58,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:58,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:20:58,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:58,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 803 [2020-10-14 05:20:58,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:58,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 05:20:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:20:58,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 05:20:58,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:59,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:59,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:59,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:59,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:59,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209056367] [2020-10-14 05:20:59,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:59,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 05:20:59,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155300033] [2020-10-14 05:20:59,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 05:20:59,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 05:20:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:20:59,269 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 44 states. [2020-10-14 05:20:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:59,712 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2020-10-14 05:20:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:20:59,713 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-14 05:20:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:59,715 INFO L225 Difference]: With dead ends: 227 [2020-10-14 05:20:59,715 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 05:20:59,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:20:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 05:20:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2020-10-14 05:20:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 05:20:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 254 transitions. [2020-10-14 05:20:59,722 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 254 transitions. Word has length 94 [2020-10-14 05:20:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:59,723 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-10-14 05:20:59,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 05:20:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 254 transitions. [2020-10-14 05:20:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:20:59,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:59,724 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:59,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:20:59,724 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 285071998, now seen corresponding path program 40 times [2020-10-14 05:20:59,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:59,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266293274] [2020-10-14 05:20:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:59,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:00,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:01,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:01,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 05:21:01,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:02,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:02,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:02,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:02,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:02,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:02,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:02,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:02,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:02,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:02,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266293274] [2020-10-14 05:21:02,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:02,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 05:21:02,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736959014] [2020-10-14 05:21:02,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 05:21:02,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 05:21:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:21:02,378 INFO L87 Difference]: Start difference. First operand 214 states and 254 transitions. Second operand 45 states. [2020-10-14 05:21:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:02,824 INFO L93 Difference]: Finished difference Result 232 states and 274 transitions. [2020-10-14 05:21:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 05:21:02,825 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-14 05:21:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:02,827 INFO L225 Difference]: With dead ends: 232 [2020-10-14 05:21:02,827 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 05:21:02,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:21:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 05:21:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2020-10-14 05:21:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 05:21:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 260 transitions. [2020-10-14 05:21:02,834 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 260 transitions. Word has length 96 [2020-10-14 05:21:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:02,834 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 260 transitions. [2020-10-14 05:21:02,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 05:21:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 260 transitions. [2020-10-14 05:21:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:21:02,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:02,835 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:02,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:21:02,836 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1248847015, now seen corresponding path program 41 times [2020-10-14 05:21:02,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:02,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771584842] [2020-10-14 05:21:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:03,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:04,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:04,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:21:04,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:04,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-14 05:21:04,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:04,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 05:21:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:04,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 05:21:04,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:05,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:05,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:05,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:05,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:05,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:05,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:05,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:05,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:05,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:05,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771584842] [2020-10-14 05:21:05,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:05,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 05:21:05,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153011537] [2020-10-14 05:21:05,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 05:21:05,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:05,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 05:21:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:21:05,512 INFO L87 Difference]: Start difference. First operand 219 states and 260 transitions. Second operand 46 states. [2020-10-14 05:21:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:05,960 INFO L93 Difference]: Finished difference Result 237 states and 280 transitions. [2020-10-14 05:21:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 05:21:05,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-14 05:21:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:05,963 INFO L225 Difference]: With dead ends: 237 [2020-10-14 05:21:05,963 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 05:21:05,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:21:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 05:21:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 224. [2020-10-14 05:21:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-14 05:21:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 266 transitions. [2020-10-14 05:21:05,969 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 266 transitions. Word has length 98 [2020-10-14 05:21:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:05,970 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 266 transitions. [2020-10-14 05:21:05,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 05:21:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 266 transitions. [2020-10-14 05:21:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:21:05,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:05,971 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:05,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:21:05,971 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2123731316, now seen corresponding path program 42 times [2020-10-14 05:21:05,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:05,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703979594] [2020-10-14 05:21:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1082 [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:07,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 05:21:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:07,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-14 05:21:07,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:08,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:08,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:08,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:08,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:08,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:08,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:08,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:08,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:08,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:08,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703979594] [2020-10-14 05:21:08,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:08,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 05:21:08,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478935759] [2020-10-14 05:21:08,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 05:21:08,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:08,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 05:21:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:21:08,180 INFO L87 Difference]: Start difference. First operand 224 states and 266 transitions. Second operand 47 states. [2020-10-14 05:21:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:08,677 INFO L93 Difference]: Finished difference Result 242 states and 286 transitions. [2020-10-14 05:21:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:21:08,678 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-14 05:21:08,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:08,680 INFO L225 Difference]: With dead ends: 242 [2020-10-14 05:21:08,680 INFO L226 Difference]: Without dead ends: 236 [2020-10-14 05:21:08,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:21:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-14 05:21:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2020-10-14 05:21:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 05:21:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 272 transitions. [2020-10-14 05:21:08,686 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 272 transitions. Word has length 100 [2020-10-14 05:21:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:08,686 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 272 transitions. [2020-10-14 05:21:08,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 05:21:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 272 transitions. [2020-10-14 05:21:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:21:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:08,687 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:08,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:21:08,688 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash 471198927, now seen corresponding path program 43 times [2020-10-14 05:21:08,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:08,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331853360] [2020-10-14 05:21:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:08,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:10,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:10,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:21:10,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-14 05:21:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:11,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:11,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:11,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:11,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:11,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:11,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:11,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:11,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331853360] [2020-10-14 05:21:11,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:11,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 05:21:11,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995821975] [2020-10-14 05:21:11,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 05:21:11,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 05:21:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:21:11,479 INFO L87 Difference]: Start difference. First operand 229 states and 272 transitions. Second operand 48 states. [2020-10-14 05:21:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:11,973 INFO L93 Difference]: Finished difference Result 247 states and 292 transitions. [2020-10-14 05:21:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:21:11,974 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-14 05:21:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:11,976 INFO L225 Difference]: With dead ends: 247 [2020-10-14 05:21:11,976 INFO L226 Difference]: Without dead ends: 241 [2020-10-14 05:21:11,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:21:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-14 05:21:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 234. [2020-10-14 05:21:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-14 05:21:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 278 transitions. [2020-10-14 05:21:11,983 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 278 transitions. Word has length 102 [2020-10-14 05:21:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:11,983 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 278 transitions. [2020-10-14 05:21:11,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 05:21:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 278 transitions. [2020-10-14 05:21:11,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:21:11,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:11,985 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:11,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:21:11,985 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1525472618, now seen corresponding path program 44 times [2020-10-14 05:21:11,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:11,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206659895] [2020-10-14 05:21:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:12,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:13,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:13,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:21:13,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:13,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-14 05:21:13,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:14,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:14,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:14,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:14,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:14,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:14,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:14,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:14,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:14,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206659895] [2020-10-14 05:21:14,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:14,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 05:21:14,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837615502] [2020-10-14 05:21:14,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 05:21:14,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 05:21:14,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 05:21:14,241 INFO L87 Difference]: Start difference. First operand 234 states and 278 transitions. Second operand 49 states. [2020-10-14 05:21:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:14,769 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2020-10-14 05:21:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 05:21:14,770 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-14 05:21:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:14,772 INFO L225 Difference]: With dead ends: 252 [2020-10-14 05:21:14,772 INFO L226 Difference]: Without dead ends: 246 [2020-10-14 05:21:14,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:21:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-14 05:21:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2020-10-14 05:21:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-14 05:21:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2020-10-14 05:21:14,779 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 104 [2020-10-14 05:21:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:14,779 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2020-10-14 05:21:14,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 05:21:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2020-10-14 05:21:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:21:14,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:14,781 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:14,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:21:14,781 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1070207813, now seen corresponding path program 45 times [2020-10-14 05:21:14,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:14,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188709193] [2020-10-14 05:21:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:16,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:16,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:21:16,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-14 05:21:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:16,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-14 05:21:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:16,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 05:21:16,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:18,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:18,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:18,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:18,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:18,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:18,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188709193] [2020-10-14 05:21:18,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:18,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 05:21:18,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317893282] [2020-10-14 05:21:18,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 05:21:18,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 05:21:18,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 05:21:18,110 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand 50 states. [2020-10-14 05:21:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:18,596 INFO L93 Difference]: Finished difference Result 257 states and 304 transitions. [2020-10-14 05:21:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 05:21:18,597 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-14 05:21:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:18,599 INFO L225 Difference]: With dead ends: 257 [2020-10-14 05:21:18,600 INFO L226 Difference]: Without dead ends: 251 [2020-10-14 05:21:18,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:21:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-14 05:21:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2020-10-14 05:21:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-14 05:21:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 290 transitions. [2020-10-14 05:21:18,608 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 290 transitions. Word has length 106 [2020-10-14 05:21:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:18,609 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 290 transitions. [2020-10-14 05:21:18,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 05:21:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 290 transitions. [2020-10-14 05:21:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:21:18,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:18,611 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:18,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:21:18,612 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1647394400, now seen corresponding path program 46 times [2020-10-14 05:21:18,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:18,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794117421] [2020-10-14 05:21:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:21,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2873 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 05:21:21,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:22,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:22,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:22,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:22,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:22,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:22,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:22,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:22,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:22,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:22,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794117421] [2020-10-14 05:21:22,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:22,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-14 05:21:22,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139567822] [2020-10-14 05:21:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-14 05:21:22,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:22,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-14 05:21:22,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 05:21:22,853 INFO L87 Difference]: Start difference. First operand 244 states and 290 transitions. Second operand 51 states. [2020-10-14 05:21:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:23,530 INFO L93 Difference]: Finished difference Result 262 states and 310 transitions. [2020-10-14 05:21:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 05:21:23,531 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 108 [2020-10-14 05:21:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:23,533 INFO L225 Difference]: With dead ends: 262 [2020-10-14 05:21:23,533 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 05:21:23,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:21:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 05:21:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 249. [2020-10-14 05:21:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 05:21:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 296 transitions. [2020-10-14 05:21:23,546 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 296 transitions. Word has length 108 [2020-10-14 05:21:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:23,546 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 296 transitions. [2020-10-14 05:21:23,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-14 05:21:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 296 transitions. [2020-10-14 05:21:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:21:23,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:23,549 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:23,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:21:23,549 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:23,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:23,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2022043973, now seen corresponding path program 47 times [2020-10-14 05:21:23,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:23,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260936514] [2020-10-14 05:21:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:23,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2924 [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:26,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 05:21:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:26,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-14 05:21:26,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:27,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:27,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:27,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:27,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260936514] [2020-10-14 05:21:27,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:27,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-14 05:21:27,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737186104] [2020-10-14 05:21:27,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-14 05:21:27,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:27,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-14 05:21:27,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 05:21:27,874 INFO L87 Difference]: Start difference. First operand 249 states and 296 transitions. Second operand 52 states. [2020-10-14 05:21:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:28,379 INFO L93 Difference]: Finished difference Result 267 states and 316 transitions. [2020-10-14 05:21:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-14 05:21:28,380 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 110 [2020-10-14 05:21:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:28,382 INFO L225 Difference]: With dead ends: 267 [2020-10-14 05:21:28,382 INFO L226 Difference]: Without dead ends: 261 [2020-10-14 05:21:28,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:21:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-14 05:21:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2020-10-14 05:21:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-14 05:21:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 302 transitions. [2020-10-14 05:21:28,388 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 302 transitions. Word has length 110 [2020-10-14 05:21:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:28,389 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 302 transitions. [2020-10-14 05:21:28,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-14 05:21:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 302 transitions. [2020-10-14 05:21:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:21:28,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:28,390 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:28,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:21:28,391 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash 2110796886, now seen corresponding path program 48 times [2020-10-14 05:21:28,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:28,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658446498] [2020-10-14 05:21:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:28,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:31,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2662 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 05:21:31,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-14 05:21:31,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:32,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:32,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:32,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:32,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:32,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:32,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:32,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:32,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658446498] [2020-10-14 05:21:32,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:32,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-14 05:21:32,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104477321] [2020-10-14 05:21:32,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-14 05:21:32,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:32,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-14 05:21:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 05:21:32,515 INFO L87 Difference]: Start difference. First operand 254 states and 302 transitions. Second operand 53 states. [2020-10-14 05:21:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:33,097 INFO L93 Difference]: Finished difference Result 272 states and 322 transitions. [2020-10-14 05:21:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 05:21:33,098 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 112 [2020-10-14 05:21:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:33,100 INFO L225 Difference]: With dead ends: 272 [2020-10-14 05:21:33,100 INFO L226 Difference]: Without dead ends: 266 [2020-10-14 05:21:33,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:21:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-14 05:21:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-10-14 05:21:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-14 05:21:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 308 transitions. [2020-10-14 05:21:33,106 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 308 transitions. Word has length 112 [2020-10-14 05:21:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:33,107 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 308 transitions. [2020-10-14 05:21:33,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-14 05:21:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 308 transitions. [2020-10-14 05:21:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:21:33,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:33,108 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:33,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:21:33,108 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 926113585, now seen corresponding path program 49 times [2020-10-14 05:21:33,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:33,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956436] [2020-10-14 05:21:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:33,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:35,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:35,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:21:35,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-14 05:21:35,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:36,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:36,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:36,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:36,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:36,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956436] [2020-10-14 05:21:36,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:36,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 05:21:36,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494793747] [2020-10-14 05:21:36,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 05:21:36,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 05:21:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 05:21:36,983 INFO L87 Difference]: Start difference. First operand 259 states and 308 transitions. Second operand 54 states. [2020-10-14 05:21:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:37,592 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-10-14 05:21:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-14 05:21:37,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 114 [2020-10-14 05:21:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:37,595 INFO L225 Difference]: With dead ends: 277 [2020-10-14 05:21:37,595 INFO L226 Difference]: Without dead ends: 271 [2020-10-14 05:21:37,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:21:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-14 05:21:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 264. [2020-10-14 05:21:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-14 05:21:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 314 transitions. [2020-10-14 05:21:37,601 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 314 transitions. Word has length 114 [2020-10-14 05:21:37,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:37,601 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 314 transitions. [2020-10-14 05:21:37,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 05:21:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 314 transitions. [2020-10-14 05:21:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:21:37,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:37,603 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:37,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:21:37,603 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash 611794764, now seen corresponding path program 50 times [2020-10-14 05:21:37,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:37,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243869127] [2020-10-14 05:21:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:38,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:40,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:40,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2676 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 05:21:40,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:41,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:41,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:41,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:41,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243869127] [2020-10-14 05:21:41,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:41,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-14 05:21:41,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114625132] [2020-10-14 05:21:41,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-14 05:21:41,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-14 05:21:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 05:21:41,911 INFO L87 Difference]: Start difference. First operand 264 states and 314 transitions. Second operand 55 states. [2020-10-14 05:21:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:42,508 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2020-10-14 05:21:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 05:21:42,509 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 116 [2020-10-14 05:21:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:42,511 INFO L225 Difference]: With dead ends: 282 [2020-10-14 05:21:42,511 INFO L226 Difference]: Without dead ends: 276 [2020-10-14 05:21:42,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:21:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-14 05:21:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2020-10-14 05:21:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-14 05:21:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 320 transitions. [2020-10-14 05:21:42,517 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 320 transitions. Word has length 116 [2020-10-14 05:21:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:42,518 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 320 transitions. [2020-10-14 05:21:42,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-14 05:21:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 320 transitions. [2020-10-14 05:21:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:21:42,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:42,519 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:21:42,519 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -800881497, now seen corresponding path program 51 times [2020-10-14 05:21:42,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:42,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874974067] [2020-10-14 05:21:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:43,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:44,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:44,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:21:44,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:44,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 05:21:44,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:46,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:46,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:46,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:46,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:46,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:46,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874974067] [2020-10-14 05:21:46,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:46,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-14 05:21:46,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134925980] [2020-10-14 05:21:46,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-14 05:21:46,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-14 05:21:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 05:21:46,530 INFO L87 Difference]: Start difference. First operand 269 states and 320 transitions. Second operand 56 states. [2020-10-14 05:21:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:47,097 INFO L93 Difference]: Finished difference Result 287 states and 340 transitions. [2020-10-14 05:21:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-14 05:21:47,098 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 118 [2020-10-14 05:21:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:47,100 INFO L225 Difference]: With dead ends: 287 [2020-10-14 05:21:47,100 INFO L226 Difference]: Without dead ends: 281 [2020-10-14 05:21:47,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:21:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-14 05:21:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2020-10-14 05:21:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 05:21:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 326 transitions. [2020-10-14 05:21:47,106 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 326 transitions. Word has length 118 [2020-10-14 05:21:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:47,106 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 326 transitions. [2020-10-14 05:21:47,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-14 05:21:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 326 transitions. [2020-10-14 05:21:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:21:47,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:47,107 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:47,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:21:47,108 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:47,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1173102782, now seen corresponding path program 52 times [2020-10-14 05:21:47,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:47,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079185659] [2020-10-14 05:21:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:47,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2949 [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:50,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-14 05:21:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:50,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-14 05:21:50,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:51,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:51,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079185659] [2020-10-14 05:21:51,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:51,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-14 05:21:51,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096548463] [2020-10-14 05:21:51,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-14 05:21:51,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-14 05:21:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 05:21:51,793 INFO L87 Difference]: Start difference. First operand 274 states and 326 transitions. Second operand 57 states. [2020-10-14 05:21:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:52,378 INFO L93 Difference]: Finished difference Result 292 states and 346 transitions. [2020-10-14 05:21:52,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 05:21:52,379 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 120 [2020-10-14 05:21:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:52,381 INFO L225 Difference]: With dead ends: 292 [2020-10-14 05:21:52,381 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 05:21:52,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:21:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 05:21:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2020-10-14 05:21:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-14 05:21:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 332 transitions. [2020-10-14 05:21:52,387 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 332 transitions. Word has length 120 [2020-10-14 05:21:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:52,388 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 332 transitions. [2020-10-14 05:21:52,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-14 05:21:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 332 transitions. [2020-10-14 05:21:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:21:52,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:52,389 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:52,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:21:52,389 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:52,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:52,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1899495197, now seen corresponding path program 53 times [2020-10-14 05:21:52,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:52,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482245543] [2020-10-14 05:21:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:53,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:55,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:55,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3025 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-14 05:21:55,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:57,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:57,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:57,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:57,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:57,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:57,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:57,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:57,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:57,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:57,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:21:57,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482245543] [2020-10-14 05:21:57,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:57,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-14 05:21:57,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327293361] [2020-10-14 05:21:57,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-14 05:21:57,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:57,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-14 05:21:57,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 05:21:57,209 INFO L87 Difference]: Start difference. First operand 279 states and 332 transitions. Second operand 58 states. [2020-10-14 05:21:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:57,818 INFO L93 Difference]: Finished difference Result 297 states and 352 transitions. [2020-10-14 05:21:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-14 05:21:57,818 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 122 [2020-10-14 05:21:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:57,821 INFO L225 Difference]: With dead ends: 297 [2020-10-14 05:21:57,821 INFO L226 Difference]: Without dead ends: 291 [2020-10-14 05:21:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:21:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-14 05:21:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 284. [2020-10-14 05:21:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-14 05:21:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 338 transitions. [2020-10-14 05:21:57,827 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 338 transitions. Word has length 122 [2020-10-14 05:21:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:57,828 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 338 transitions. [2020-10-14 05:21:57,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-14 05:21:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 338 transitions. [2020-10-14 05:21:57,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:21:57,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:57,829 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:57,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:21:57,829 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -271346632, now seen corresponding path program 54 times [2020-10-14 05:21:57,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:57,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931806346] [2020-10-14 05:21:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:57,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:00,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2762 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 05:22:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:02,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:02,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:02,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:02,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:02,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931806346] [2020-10-14 05:22:02,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:02,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-14 05:22:02,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174260027] [2020-10-14 05:22:02,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-14 05:22:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-14 05:22:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 05:22:02,486 INFO L87 Difference]: Start difference. First operand 284 states and 338 transitions. Second operand 59 states. [2020-10-14 05:22:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:03,177 INFO L93 Difference]: Finished difference Result 302 states and 358 transitions. [2020-10-14 05:22:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 05:22:03,178 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 124 [2020-10-14 05:22:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:03,180 INFO L225 Difference]: With dead ends: 302 [2020-10-14 05:22:03,180 INFO L226 Difference]: Without dead ends: 296 [2020-10-14 05:22:03,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:22:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-14 05:22:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 289. [2020-10-14 05:22:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-14 05:22:03,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 344 transitions. [2020-10-14 05:22:03,186 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 344 transitions. Word has length 124 [2020-10-14 05:22:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:03,186 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 344 transitions. [2020-10-14 05:22:03,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-14 05:22:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 344 transitions. [2020-10-14 05:22:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:22:03,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:03,187 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:03,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:22:03,188 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash 903761555, now seen corresponding path program 55 times [2020-10-14 05:22:03,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:03,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660564196] [2020-10-14 05:22:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:03,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:03,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:06,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3377 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 05:22:06,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:08,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:08,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:08,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:08,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:08,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:08,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:08,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:08,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660564196] [2020-10-14 05:22:08,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:08,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-14 05:22:08,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788747767] [2020-10-14 05:22:08,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-14 05:22:08,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-14 05:22:08,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 05:22:08,451 INFO L87 Difference]: Start difference. First operand 289 states and 344 transitions. Second operand 60 states. [2020-10-14 05:22:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:09,168 INFO L93 Difference]: Finished difference Result 307 states and 364 transitions. [2020-10-14 05:22:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 05:22:09,168 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 126 [2020-10-14 05:22:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:09,170 INFO L225 Difference]: With dead ends: 307 [2020-10-14 05:22:09,171 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 05:22:09,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:22:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 05:22:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 294. [2020-10-14 05:22:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-14 05:22:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 350 transitions. [2020-10-14 05:22:09,176 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 350 transitions. Word has length 126 [2020-10-14 05:22:09,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:09,176 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 350 transitions. [2020-10-14 05:22:09,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-14 05:22:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 350 transitions. [2020-10-14 05:22:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:22:09,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:09,178 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:09,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:22:09,178 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash 606330414, now seen corresponding path program 56 times [2020-10-14 05:22:09,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:09,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785986227] [2020-10-14 05:22:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:12,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:12,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:22:12,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:12,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3075 [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 05:22:12,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:14,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:14,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:14,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:14,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:14,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:14,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785986227] [2020-10-14 05:22:14,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:14,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-14 05:22:14,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617513212] [2020-10-14 05:22:14,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-14 05:22:14,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-14 05:22:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 05:22:14,257 INFO L87 Difference]: Start difference. First operand 294 states and 350 transitions. Second operand 61 states. [2020-10-14 05:22:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:15,081 INFO L93 Difference]: Finished difference Result 312 states and 370 transitions. [2020-10-14 05:22:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 05:22:15,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 128 [2020-10-14 05:22:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:15,084 INFO L225 Difference]: With dead ends: 312 [2020-10-14 05:22:15,084 INFO L226 Difference]: Without dead ends: 306 [2020-10-14 05:22:15,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:22:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-14 05:22:15,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-10-14 05:22:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 05:22:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 356 transitions. [2020-10-14 05:22:15,090 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 356 transitions. Word has length 128 [2020-10-14 05:22:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:15,091 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 356 transitions. [2020-10-14 05:22:15,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-14 05:22:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 356 transitions. [2020-10-14 05:22:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:22:15,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:15,092 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:15,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:22:15,093 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:15,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:15,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1757154551, now seen corresponding path program 57 times [2020-10-14 05:22:15,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:15,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482595792] [2020-10-14 05:22:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:15,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:16,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:18,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:18,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:22:18,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3071 [2020-10-14 05:22:18,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:18,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-14 05:22:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-14 05:22:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:22:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:20,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:20,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:20,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:20,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:20,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:20,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:20,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482595792] [2020-10-14 05:22:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:20,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-14 05:22:20,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560516861] [2020-10-14 05:22:20,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-14 05:22:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:20,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-14 05:22:20,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2020-10-14 05:22:20,229 INFO L87 Difference]: Start difference. First operand 299 states and 356 transitions. Second operand 62 states. [2020-10-14 05:22:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:20,958 INFO L93 Difference]: Finished difference Result 317 states and 376 transitions. [2020-10-14 05:22:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-14 05:22:20,958 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 130 [2020-10-14 05:22:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:20,961 INFO L225 Difference]: With dead ends: 317 [2020-10-14 05:22:20,961 INFO L226 Difference]: Without dead ends: 311 [2020-10-14 05:22:20,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:22:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-14 05:22:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 304. [2020-10-14 05:22:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-14 05:22:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 362 transitions. [2020-10-14 05:22:20,967 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 362 transitions. Word has length 130 [2020-10-14 05:22:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:20,968 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 362 transitions. [2020-10-14 05:22:20,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-14 05:22:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 362 transitions. [2020-10-14 05:22:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:22:20,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:20,969 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:20,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:22:20,969 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:20,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1028506332, now seen corresponding path program 58 times [2020-10-14 05:22:20,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:20,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432367884] [2020-10-14 05:22:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:21,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:24,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:24,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:22:24,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:24,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3872 [2020-10-14 05:22:24,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:24,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-14 05:22:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:24,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-14 05:22:24,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:27,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:27,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:27,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432367884] [2020-10-14 05:22:27,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:27,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-14 05:22:27,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334600191] [2020-10-14 05:22:27,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-14 05:22:27,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-14 05:22:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 05:22:27,027 INFO L87 Difference]: Start difference. First operand 304 states and 362 transitions. Second operand 63 states. [2020-10-14 05:22:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:27,810 INFO L93 Difference]: Finished difference Result 322 states and 382 transitions. [2020-10-14 05:22:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 05:22:27,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 132 [2020-10-14 05:22:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:27,813 INFO L225 Difference]: With dead ends: 322 [2020-10-14 05:22:27,813 INFO L226 Difference]: Without dead ends: 316 [2020-10-14 05:22:27,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 05:22:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-10-14 05:22:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 309. [2020-10-14 05:22:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-14 05:22:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 368 transitions. [2020-10-14 05:22:27,818 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 368 transitions. Word has length 132 [2020-10-14 05:22:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:27,819 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 368 transitions. [2020-10-14 05:22:27,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-14 05:22:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 368 transitions. [2020-10-14 05:22:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:22:27,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:27,820 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:27,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:22:27,821 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -877237121, now seen corresponding path program 59 times [2020-10-14 05:22:27,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:27,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357761630] [2020-10-14 05:22:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:27,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:28,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:31,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:31,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:22:31,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:31,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3496 [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-14 05:22:31,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:33,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:33,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:33,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:33,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:33,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357761630] [2020-10-14 05:22:33,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:33,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-14 05:22:33,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251734420] [2020-10-14 05:22:33,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-14 05:22:33,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:33,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-14 05:22:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=2137, Unknown=0, NotChecked=0, Total=4032 [2020-10-14 05:22:33,590 INFO L87 Difference]: Start difference. First operand 309 states and 368 transitions. Second operand 64 states. [2020-10-14 05:22:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:34,389 INFO L93 Difference]: Finished difference Result 327 states and 388 transitions. [2020-10-14 05:22:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 05:22:34,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 134 [2020-10-14 05:22:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:34,392 INFO L225 Difference]: With dead ends: 327 [2020-10-14 05:22:34,393 INFO L226 Difference]: Without dead ends: 321 [2020-10-14 05:22:34,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 05:22:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-14 05:22:34,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 314. [2020-10-14 05:22:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-10-14 05:22:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 374 transitions. [2020-10-14 05:22:34,398 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 374 transitions. Word has length 134 [2020-10-14 05:22:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:34,399 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 374 transitions. [2020-10-14 05:22:34,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-14 05:22:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 374 transitions. [2020-10-14 05:22:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:22:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:34,400 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:34,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:22:34,400 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1536413414, now seen corresponding path program 60 times [2020-10-14 05:22:34,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:34,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31874407] [2020-10-14 05:22:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:34,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:35,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:38,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:38,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:22:38,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:38,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3961 [2020-10-14 05:22:38,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:38,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 05:22:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:38,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 05:22:38,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:40,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:40,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:40,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:40,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:40,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:40,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31874407] [2020-10-14 05:22:40,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:40,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-14 05:22:40,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605311750] [2020-10-14 05:22:40,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-14 05:22:40,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-14 05:22:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=2203, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 05:22:40,710 INFO L87 Difference]: Start difference. First operand 314 states and 374 transitions. Second operand 65 states. [2020-10-14 05:22:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:41,525 INFO L93 Difference]: Finished difference Result 330 states and 392 transitions. [2020-10-14 05:22:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 05:22:41,526 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 136 [2020-10-14 05:22:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:41,529 INFO L225 Difference]: With dead ends: 330 [2020-10-14 05:22:41,529 INFO L226 Difference]: Without dead ends: 324 [2020-10-14 05:22:41,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 05:22:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-14 05:22:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 319. [2020-10-14 05:22:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-14 05:22:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 380 transitions. [2020-10-14 05:22:41,536 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 380 transitions. Word has length 136 [2020-10-14 05:22:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:41,536 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 380 transitions. [2020-10-14 05:22:41,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-14 05:22:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 380 transitions. [2020-10-14 05:22:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:22:41,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:41,538 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:41,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:22:41,538 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:41,539 INFO L82 PathProgramCache]: Analyzing trace with hash 650328821, now seen corresponding path program 61 times [2020-10-14 05:22:41,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:41,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801242057] [2020-10-14 05:22:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:41,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:44,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:44,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:22:44,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3106 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 05:22:44,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:47,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:47,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:47,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:47,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:47,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801242057] [2020-10-14 05:22:47,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:47,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 05:22:47,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891159235] [2020-10-14 05:22:47,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 05:22:47,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 05:22:47,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=2270, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 05:22:47,070 INFO L87 Difference]: Start difference. First operand 319 states and 380 transitions. Second operand 66 states. [2020-10-14 05:22:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:47,970 INFO L93 Difference]: Finished difference Result 337 states and 400 transitions. [2020-10-14 05:22:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-14 05:22:47,971 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 138 [2020-10-14 05:22:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:47,973 INFO L225 Difference]: With dead ends: 337 [2020-10-14 05:22:47,973 INFO L226 Difference]: Without dead ends: 331 [2020-10-14 05:22:47,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 05:22:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-14 05:22:47,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2020-10-14 05:22:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-14 05:22:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 386 transitions. [2020-10-14 05:22:47,979 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 386 transitions. Word has length 138 [2020-10-14 05:22:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:47,979 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 386 transitions. [2020-10-14 05:22:47,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 05:22:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 386 transitions. [2020-10-14 05:22:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:22:47,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:47,981 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:47,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:22:47,981 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:47,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:47,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1870608912, now seen corresponding path program 62 times [2020-10-14 05:22:47,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:47,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445106430] [2020-10-14 05:22:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:48,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:52,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4403 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-14 05:22:52,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:54,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:54,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:54,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:54,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:54,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:22:54,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445106430] [2020-10-14 05:22:54,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:54,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-14 05:22:54,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749150795] [2020-10-14 05:22:54,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-14 05:22:54,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-14 05:22:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=2338, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 05:22:54,915 INFO L87 Difference]: Start difference. First operand 324 states and 386 transitions. Second operand 67 states. [2020-10-14 05:22:55,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:55,927 INFO L93 Difference]: Finished difference Result 342 states and 406 transitions. [2020-10-14 05:22:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-14 05:22:55,928 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 140 [2020-10-14 05:22:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:55,931 INFO L225 Difference]: With dead ends: 342 [2020-10-14 05:22:55,931 INFO L226 Difference]: Without dead ends: 336 [2020-10-14 05:22:55,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 05:22:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-14 05:22:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 329. [2020-10-14 05:22:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-14 05:22:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 392 transitions. [2020-10-14 05:22:55,935 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 392 transitions. Word has length 140 [2020-10-14 05:22:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:55,936 INFO L479 AbstractCegarLoop]: Abstraction has 329 states and 392 transitions. [2020-10-14 05:22:55,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-14 05:22:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 392 transitions. [2020-10-14 05:22:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:22:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:55,937 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:55,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:22:55,937 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2033704555, now seen corresponding path program 63 times [2020-10-14 05:22:55,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:55,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449983157] [2020-10-14 05:22:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:56,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:59,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:59,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:22:59,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3806 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-14 05:22:59,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:02,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:02,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:02,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:02,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:02,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:02,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449983157] [2020-10-14 05:23:02,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:02,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-14 05:23:02,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979288869] [2020-10-14 05:23:02,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-14 05:23:02,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-14 05:23:02,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=2407, Unknown=0, NotChecked=0, Total=4556 [2020-10-14 05:23:02,355 INFO L87 Difference]: Start difference. First operand 329 states and 392 transitions. Second operand 68 states. [2020-10-14 05:23:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:03,416 INFO L93 Difference]: Finished difference Result 347 states and 412 transitions. [2020-10-14 05:23:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 05:23:03,416 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 142 [2020-10-14 05:23:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:03,418 INFO L225 Difference]: With dead ends: 347 [2020-10-14 05:23:03,419 INFO L226 Difference]: Without dead ends: 341 [2020-10-14 05:23:03,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:23:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-14 05:23:03,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 334. [2020-10-14 05:23:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-14 05:23:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 398 transitions. [2020-10-14 05:23:03,426 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 398 transitions. Word has length 142 [2020-10-14 05:23:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:03,426 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 398 transitions. [2020-10-14 05:23:03,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-14 05:23:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 398 transitions. [2020-10-14 05:23:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:23:03,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:03,428 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:03,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:23:03,428 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash -145172474, now seen corresponding path program 64 times [2020-10-14 05:23:03,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:03,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223036470] [2020-10-14 05:23:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:04,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:08,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:08,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:23:08,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:08,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4786 [2020-10-14 05:23:08,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:08,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-14 05:23:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:08,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-14 05:23:08,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:10,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:10,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:10,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:10,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:10,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:10,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:10,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:10,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223036470] [2020-10-14 05:23:10,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:10,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-14 05:23:10,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259718428] [2020-10-14 05:23:10,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-14 05:23:10,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-14 05:23:10,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 05:23:10,864 INFO L87 Difference]: Start difference. First operand 334 states and 398 transitions. Second operand 69 states. [2020-10-14 05:23:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:12,002 INFO L93 Difference]: Finished difference Result 352 states and 418 transitions. [2020-10-14 05:23:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-14 05:23:12,003 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 144 [2020-10-14 05:23:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:12,005 INFO L225 Difference]: With dead ends: 352 [2020-10-14 05:23:12,005 INFO L226 Difference]: Without dead ends: 346 [2020-10-14 05:23:12,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 05:23:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-14 05:23:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2020-10-14 05:23:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-14 05:23:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 404 transitions. [2020-10-14 05:23:12,011 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 404 transitions. Word has length 144 [2020-10-14 05:23:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:12,012 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 404 transitions. [2020-10-14 05:23:12,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-14 05:23:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 404 transitions. [2020-10-14 05:23:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:23:12,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:12,013 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:12,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:23:12,013 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:12,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:12,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1898043105, now seen corresponding path program 65 times [2020-10-14 05:23:12,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:12,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040411248] [2020-10-14 05:23:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:12,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:17,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-14 05:23:17,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 05:23:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:19,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:19,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:19,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:19,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:19,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:19,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040411248] [2020-10-14 05:23:19,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:19,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-14 05:23:19,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024649037] [2020-10-14 05:23:19,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-14 05:23:19,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-14 05:23:19,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=2548, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 05:23:19,805 INFO L87 Difference]: Start difference. First operand 339 states and 404 transitions. Second operand 70 states. [2020-10-14 05:23:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:20,941 INFO L93 Difference]: Finished difference Result 357 states and 424 transitions. [2020-10-14 05:23:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-14 05:23:20,941 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 146 [2020-10-14 05:23:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:20,943 INFO L225 Difference]: With dead ends: 357 [2020-10-14 05:23:20,943 INFO L226 Difference]: Without dead ends: 351 [2020-10-14 05:23:20,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:23:20,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-14 05:23:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 344. [2020-10-14 05:23:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-14 05:23:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 410 transitions. [2020-10-14 05:23:20,951 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 410 transitions. Word has length 146 [2020-10-14 05:23:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:20,951 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 410 transitions. [2020-10-14 05:23:20,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-14 05:23:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 410 transitions. [2020-10-14 05:23:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:23:20,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:20,953 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:20,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:23:20,953 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:20,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:20,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1666807044, now seen corresponding path program 66 times [2020-10-14 05:23:20,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:20,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115844476] [2020-10-14 05:23:20,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:21,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:25,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:23:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4910 [2020-10-14 05:23:25,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:25,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-14 05:23:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-14 05:23:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:28,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:28,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:28,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:28,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:28,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:28,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:28,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115844476] [2020-10-14 05:23:28,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:28,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-14 05:23:28,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941333899] [2020-10-14 05:23:28,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-14 05:23:28,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-14 05:23:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2350, Invalid=2620, Unknown=0, NotChecked=0, Total=4970 [2020-10-14 05:23:28,723 INFO L87 Difference]: Start difference. First operand 344 states and 410 transitions. Second operand 71 states. [2020-10-14 05:23:29,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:29,861 INFO L93 Difference]: Finished difference Result 362 states and 430 transitions. [2020-10-14 05:23:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 05:23:29,862 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 148 [2020-10-14 05:23:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:29,864 INFO L225 Difference]: With dead ends: 362 [2020-10-14 05:23:29,864 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 05:23:29,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 05:23:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 05:23:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 349. [2020-10-14 05:23:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-14 05:23:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 416 transitions. [2020-10-14 05:23:29,870 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 416 transitions. Word has length 148 [2020-10-14 05:23:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:29,870 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 416 transitions. [2020-10-14 05:23:29,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-14 05:23:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 416 transitions. [2020-10-14 05:23:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:23:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:29,872 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:29,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:23:29,872 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -103898025, now seen corresponding path program 67 times [2020-10-14 05:23:29,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:29,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493800343] [2020-10-14 05:23:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:29,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:31,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:34,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:34,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-14 05:23:34,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:37,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:37,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:37,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:37,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:37,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493800343] [2020-10-14 05:23:37,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:37,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-14 05:23:37,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747653286] [2020-10-14 05:23:37,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-14 05:23:37,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-14 05:23:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=2693, Unknown=0, NotChecked=0, Total=5112 [2020-10-14 05:23:37,910 INFO L87 Difference]: Start difference. First operand 349 states and 416 transitions. Second operand 72 states. [2020-10-14 05:23:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:39,052 INFO L93 Difference]: Finished difference Result 367 states and 436 transitions. [2020-10-14 05:23:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-14 05:23:39,053 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 150 [2020-10-14 05:23:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:39,055 INFO L225 Difference]: With dead ends: 367 [2020-10-14 05:23:39,055 INFO L226 Difference]: Without dead ends: 361 [2020-10-14 05:23:39,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:23:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-14 05:23:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 354. [2020-10-14 05:23:39,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-14 05:23:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 422 transitions. [2020-10-14 05:23:39,061 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 422 transitions. Word has length 150 [2020-10-14 05:23:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:39,062 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 422 transitions. [2020-10-14 05:23:39,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-14 05:23:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 422 transitions. [2020-10-14 05:23:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 05:23:39,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:39,063 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:39,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:23:39,063 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:39,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1386884366, now seen corresponding path program 68 times [2020-10-14 05:23:39,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:39,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779287150] [2020-10-14 05:23:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:39,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:40,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:44,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:44,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 05:23:44,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:44,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4974 [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-14 05:23:44,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:47,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:47,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:47,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:47,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:47,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:47,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779287150] [2020-10-14 05:23:47,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:47,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-14 05:23:47,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247595084] [2020-10-14 05:23:47,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-14 05:23:47,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:47,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-14 05:23:47,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2489, Invalid=2767, Unknown=0, NotChecked=0, Total=5256 [2020-10-14 05:23:47,071 INFO L87 Difference]: Start difference. First operand 354 states and 422 transitions. Second operand 73 states. [2020-10-14 05:23:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:48,044 INFO L93 Difference]: Finished difference Result 372 states and 442 transitions. [2020-10-14 05:23:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-14 05:23:48,045 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 152 [2020-10-14 05:23:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:48,048 INFO L225 Difference]: With dead ends: 372 [2020-10-14 05:23:48,048 INFO L226 Difference]: Without dead ends: 366 [2020-10-14 05:23:48,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:23:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-14 05:23:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2020-10-14 05:23:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-14 05:23:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 428 transitions. [2020-10-14 05:23:48,054 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 428 transitions. Word has length 152 [2020-10-14 05:23:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:48,054 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 428 transitions. [2020-10-14 05:23:48,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-14 05:23:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 428 transitions. [2020-10-14 05:23:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 05:23:48,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:48,055 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:48,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:23:48,056 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1681144115, now seen corresponding path program 69 times [2020-10-14 05:23:48,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:48,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684913191] [2020-10-14 05:23:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:49,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:52,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:52,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 05:23:52,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:52,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4651 [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-14 05:23:52,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:55,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:55,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:55,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:55,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:55,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:55,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:23:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684913191] [2020-10-14 05:23:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:55,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-14 05:23:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536755383] [2020-10-14 05:23:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-14 05:23:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-14 05:23:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2020-10-14 05:23:55,828 INFO L87 Difference]: Start difference. First operand 359 states and 428 transitions. Second operand 74 states. [2020-10-14 05:23:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:56,978 INFO L93 Difference]: Finished difference Result 377 states and 448 transitions. [2020-10-14 05:23:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-14 05:23:56,979 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 154 [2020-10-14 05:23:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:56,981 INFO L225 Difference]: With dead ends: 377 [2020-10-14 05:23:56,982 INFO L226 Difference]: Without dead ends: 371 [2020-10-14 05:23:56,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2020-10-14 05:23:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-10-14 05:23:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 364. [2020-10-14 05:23:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-14 05:23:56,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 434 transitions. [2020-10-14 05:23:56,986 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 434 transitions. Word has length 154 [2020-10-14 05:23:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:56,987 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 434 transitions. [2020-10-14 05:23:56,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-14 05:23:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 434 transitions. [2020-10-14 05:23:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 05:23:56,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:56,988 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:56,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:23:56,988 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash -996921368, now seen corresponding path program 70 times [2020-10-14 05:23:56,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:56,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163121187] [2020-10-14 05:23:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:57,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:02,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-14 05:24:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:24:02,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-14 05:24:02,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0