/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/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:29:19,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:29:19,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:29:19,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:29:19,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:29:19,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:29:19,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:29:19,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:29:19,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:29:19,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:29:19,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:29:19,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:29:19,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:29:19,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:29:19,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:29:19,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:29:19,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:29:19,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:29:19,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:29:19,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:29:19,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:29:19,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:29:19,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:29:19,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:29:19,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:29:19,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:29:19,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:29:19,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:29:19,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:29:19,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:29:19,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:29:19,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:29:19,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:29:19,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:29:19,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:29:19,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:29:19,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:29:19,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:29:19,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:29:19,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:29:19,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:29:19,392 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 05:29:19,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:29:19,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:29:19,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:29:19,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:29:19,438 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:29:19,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:29:19,438 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:29:19,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:29:19,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:29:19,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:29:19,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:29:19,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:29:19,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:29:19,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:29:19,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:29:19,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:29:19,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:29:19,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:29:19,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:29:19,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:29:19,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:29:19,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:29:19,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:29:19,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:29:19,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:29:19,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:29:19,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:29:19,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:29:19,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:29:19,443 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 05:29:19,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:29:19,747 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:29:19,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:29:19,752 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:29:19,752 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:29:19,753 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-14 05:29:19,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1951991c1/7b989847799145fb891a0d9c09005f8e/FLAG134a957d7 [2020-10-14 05:29:20,241 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:29:20,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2020-10-14 05:29:20,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1951991c1/7b989847799145fb891a0d9c09005f8e/FLAG134a957d7 [2020-10-14 05:29:20,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1951991c1/7b989847799145fb891a0d9c09005f8e [2020-10-14 05:29:20,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:29:20,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:29:20,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:20,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:29:20,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:29:20,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b309059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20, skipping insertion in model container [2020-10-14 05:29:20,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:29:20,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:29:20,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:20,847 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:29:20,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:20,873 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:29:20,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20 WrapperNode [2020-10-14 05:29:20,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:20,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:29:20,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:29:20,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:29:20,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,894 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (1/1) ... [2020-10-14 05:29:20,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:29:20,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:29:20,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:29:20,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:29:20,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (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 05:29:21,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:29:21,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:29:21,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:29:21,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:29:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:29:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:29:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:29:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:29:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:29:21,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:29:21,222 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:29:21,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:21 BoogieIcfgContainer [2020-10-14 05:29:21,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:29:21,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:29:21,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:29:21,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:29:21,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:29:20" (1/3) ... [2020-10-14 05:29:21,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:21, skipping insertion in model container [2020-10-14 05:29:21,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:20" (2/3) ... [2020-10-14 05:29:21,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:21, skipping insertion in model container [2020-10-14 05:29:21,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:21" (3/3) ... [2020-10-14 05:29:21,234 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2020-10-14 05:29:21,244 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:29:21,250 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:29:21,264 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:29:21,284 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:29:21,284 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:29:21,284 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:29:21,284 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:29:21,285 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:29:21,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:29:21,285 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:29:21,285 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:29:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-14 05:29:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:21,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:21,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:21,306 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:21,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:21,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-14 05:29:21,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:21,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493847480] [2020-10-14 05:29:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:21,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:21,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-14 05:29:21,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:21,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:29:21,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:21,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:21,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:21,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:21,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:21,548 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 05:29:21,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493847480] [2020-10-14 05:29:21,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:21,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:29:21,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521255500] [2020-10-14 05:29:21,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:29:21,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:29:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:29:21,574 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-14 05:29:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:21,597 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-14 05:29:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:29:21,598 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-14 05:29:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:21,606 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:21,607 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 05:29:21,610 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 05:29:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 05:29:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 05:29:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:29:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-10-14 05:29:21,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2020-10-14 05:29:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:21,644 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-10-14 05:29:21,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:29:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-10-14 05:29:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:21,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:21,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:21,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:29:21,646 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2052575882, now seen corresponding path program 1 times [2020-10-14 05:29:21,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:21,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555051151] [2020-10-14 05:29:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:21,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:21,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-14 05:29:21,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:29:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:21,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:21,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:21,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:21,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:29:21,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:21,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:21,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:21,842 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 05:29:21,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555051151] [2020-10-14 05:29:21,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:21,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:21,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440827768] [2020-10-14 05:29:21,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:21,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:21,851 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-10-14 05:29:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:21,875 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-14 05:29:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:21,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-14 05:29:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:21,881 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:29:21,882 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:29:21,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:29:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:29:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:29:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-14 05:29:21,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-10-14 05:29:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:21,888 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-14 05:29:21,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-14 05:29:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:29:21,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:21,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:21,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:29:21,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:21,891 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-14 05:29:21,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:21,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968580266] [2020-10-14 05:29:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:29:22,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:22,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-14 05:29:22,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:22,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:22,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:22,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:29:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:22,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:22,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968580266] [2020-10-14 05:29:22,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:22,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:22,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498105662] [2020-10-14 05:29:22,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:22,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:22,084 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-10-14 05:29:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,105 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-14 05:29:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:22,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:29:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,106 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:22,107 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:29:22,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:22,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:29:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:29:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:29:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-14 05:29:22,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-14 05:29:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,113 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-14 05:29:22,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-14 05:29:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:29:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:29:22,114 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1836600793, now seen corresponding path program 1 times [2020-10-14 05:29:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856719194] [2020-10-14 05:29:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:29:22,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:22,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-14 05:29:22,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:22,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:22,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:22,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856719194] [2020-10-14 05:29:22,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:22,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:22,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408578513] [2020-10-14 05:29:22,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:22,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:22,254 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2020-10-14 05:29:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,276 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-10-14 05:29:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:22,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:29:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,278 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:22,278 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:29:22,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:29:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 05:29:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:29:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 05:29:22,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-14 05:29:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,284 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 05:29:22,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 05:29:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:29:22,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,286 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:29:22,286 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1341092318, now seen corresponding path program 1 times [2020-10-14 05:29:22,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429397179] [2020-10-14 05:29:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:29:22,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:22,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-14 05:29:22,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:22,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:22,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:22,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:29:22,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:29:22,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429397179] [2020-10-14 05:29:22,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:22,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:22,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213550391] [2020-10-14 05:29:22,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:22,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:22,523 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-14 05:29:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,560 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:29:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:22,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:29:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,562 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:22,562 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:29:22,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:29:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-14 05:29:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:29:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 05:29:22,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-10-14 05:29:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,568 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 05:29:22,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 05:29:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:29:22,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,569 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:29:22,569 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1411348862, now seen corresponding path program 2 times [2020-10-14 05:29:22,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990648186] [2020-10-14 05:29:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:29:22,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-14 05:29:22,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:22,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:29:22,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:22,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:22,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990648186] [2020-10-14 05:29:22,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:22,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:22,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431955590] [2020-10-14 05:29:22,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:22,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:22,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:22,701 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-14 05:29:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,724 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 05:29:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:22,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:29:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,726 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:29:22,726 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:29:22,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:29:22,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:29:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:29:22,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-14 05:29:22,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-14 05:29:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,732 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-14 05:29:22,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:22,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-14 05:29:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:29:22,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:29:22,733 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,734 INFO L82 PathProgramCache]: Analyzing trace with hash 600666657, now seen corresponding path program 3 times [2020-10-14 05:29:22,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270564819] [2020-10-14 05:29:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:29:22,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:22,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:29:22,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:22,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:22,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:29:22,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:22,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:22,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:22,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:22,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:22,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:22,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:22,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:22,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:22,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270564819] [2020-10-14 05:29:22,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:22,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:22,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074249320] [2020-10-14 05:29:22,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:22,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:22,921 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-14 05:29:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:22,948 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:29:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:22,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 05:29:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:22,950 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:22,950 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:29:22,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:29:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:29:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:29:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:29:22,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-14 05:29:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:22,956 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:29:22,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:29:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:29:22,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:22,957 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:22,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:29:22,957 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1075851772, now seen corresponding path program 4 times [2020-10-14 05:29:22,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:22,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269495203] [2020-10-14 05:29:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:22,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:29:23,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:23,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-14 05:29:23,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:29:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:29:23,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:23,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:23,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:23,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:23,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:23,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:23,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:29:23,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269495203] [2020-10-14 05:29:23,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:23,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:23,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684221155] [2020-10-14 05:29:23,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:23,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:23,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:23,248 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-14 05:29:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:23,279 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:29:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:23,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 05:29:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:23,283 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:23,283 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:29:23,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:29:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-14 05:29:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:29:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-14 05:29:23,290 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2020-10-14 05:29:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:23,290 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-14 05:29:23,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-14 05:29:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:29:23,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:23,291 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:23,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:29:23,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash -896261463, now seen corresponding path program 5 times [2020-10-14 05:29:23,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:23,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275447668] [2020-10-14 05:29:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:23,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:29:23,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:23,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:23,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:23,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:23,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:29:23,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275447668] [2020-10-14 05:29:23,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:23,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:23,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33617552] [2020-10-14 05:29:23,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:23,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:23,575 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-14 05:29:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:23,609 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:29:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:23,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 05:29:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:23,610 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:29:23,611 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:29:23,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:23,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:29:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 05:29:23,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:29:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-14 05:29:23,617 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2020-10-14 05:29:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:23,617 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-14 05:29:23,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-14 05:29:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:29:23,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:23,618 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:23,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:29:23,618 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 478139660, now seen corresponding path program 6 times [2020-10-14 05:29:23,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:23,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199022501] [2020-10-14 05:29:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:23,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:23,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:29:23,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:23,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 357 [2020-10-14 05:29:23,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:23,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:29:23,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:29:23,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:24,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:24,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:24,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:24,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199022501] [2020-10-14 05:29:24,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:24,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:24,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718467508] [2020-10-14 05:29:24,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:24,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:24,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:24,022 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-14 05:29:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:24,065 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-14 05:29:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:24,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-14 05:29:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:24,067 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:29:24,068 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:29:24,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:29:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-14 05:29:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:29:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 05:29:24,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-10-14 05:29:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:24,077 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 05:29:24,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 05:29:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:29:24,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:24,079 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:24,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:29:24,080 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2135852977, now seen corresponding path program 7 times [2020-10-14 05:29:24,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:24,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167494910] [2020-10-14 05:29:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:29:24,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:24,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-14 05:29:24,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:24,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:29:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:24,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:24,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:24,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:24,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:24,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:24,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:24,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:24,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:24,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 05:29:24,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167494910] [2020-10-14 05:29:24,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:24,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:24,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640197902] [2020-10-14 05:29:24,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:24,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:24,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:24,622 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-14 05:29:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:24,651 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-14 05:29:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:24,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 05:29:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:24,652 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:29:24,652 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:29:24,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:29:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-14 05:29:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:29:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:29:24,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 27 [2020-10-14 05:29:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:24,659 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:29:24,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:24,659 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:29:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:29:24,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:24,660 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:24,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:29:24,661 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1822470607, now seen corresponding path program 8 times [2020-10-14 05:29:24,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:24,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235281846] [2020-10-14 05:29:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:24,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:25,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:29:25,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:25,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:29:25,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:25,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:25,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:25,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:25,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:25,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:25,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:25,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:25,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235281846] [2020-10-14 05:29:25,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:25,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:25,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57270492] [2020-10-14 05:29:25,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:25,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:25,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:25,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:25,235 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-14 05:29:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:25,273 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 05:29:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:25,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 05:29:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:25,275 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:29:25,275 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:29:25,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:29:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:29:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:29:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:29:25,280 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:29:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:25,280 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:29:25,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:29:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:29:25,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:25,282 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:25,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:29:25,282 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:25,283 INFO L82 PathProgramCache]: Analyzing trace with hash -47970996, now seen corresponding path program 9 times [2020-10-14 05:29:25,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:25,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501122063] [2020-10-14 05:29:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:25,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:25,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:29:25,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 05:29:25,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:25,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:29:25,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:25,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:25,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:25,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:25,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:25,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:25,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:25,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:25,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:25,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:25,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501122063] [2020-10-14 05:29:25,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:25,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:25,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160240695] [2020-10-14 05:29:25,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:25,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:25,977 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-10-14 05:29:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:26,018 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-14 05:29:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:26,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 05:29:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:26,020 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:29:26,020 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:29:26,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:29:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:29:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:29:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 05:29:26,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-14 05:29:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:26,026 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 05:29:26,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 05:29:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:29:26,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:26,027 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:26,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:29:26,027 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2048945545, now seen corresponding path program 10 times [2020-10-14 05:29:26,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:26,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531308229] [2020-10-14 05:29:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:26,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:29:26,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:26,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:26,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:26,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:26,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:26,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:26,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:26,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:26,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:26,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:26,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:26,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:29:26,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531308229] [2020-10-14 05:29:26,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:26,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:26,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165366879] [2020-10-14 05:29:26,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:26,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:26,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:26,672 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-14 05:29:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:26,721 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-14 05:29:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:26,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-14 05:29:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:26,722 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:29:26,722 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:29:26,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:29:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 05:29:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:29:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:29:26,734 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-14 05:29:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:26,735 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:29:26,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:29:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:29:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:26,737 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:26,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:29:26,738 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1825011268, now seen corresponding path program 11 times [2020-10-14 05:29:26,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:26,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357334746] [2020-10-14 05:29:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:27,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:27,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:27,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:29:27,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:27,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:27,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:27,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:27,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:27,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:27,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:27,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:27,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:27,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:27,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:27,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:27,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357334746] [2020-10-14 05:29:27,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:27,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:27,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570431345] [2020-10-14 05:29:27,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:27,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:27,669 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2020-10-14 05:29:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:27,724 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-14 05:29:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:27,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-14 05:29:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:27,727 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:29:27,727 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:29:27,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:27,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:29:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:29:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:29:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:29:27,738 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-14 05:29:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:27,738 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:29:27,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:29:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:29:27,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:27,741 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:27,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:29:27,741 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -928286719, now seen corresponding path program 12 times [2020-10-14 05:29:27,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:27,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941313764] [2020-10-14 05:29:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:27,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:27,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:28,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:29:28,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-14 05:29:28,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:28,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:29:28,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:29:28,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:28,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:28,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:29:28,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941313764] [2020-10-14 05:29:28,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:28,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:28,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131381289] [2020-10-14 05:29:28,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:28,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:28,644 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-14 05:29:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:28,690 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-14 05:29:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:28,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-14 05:29:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:28,692 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:29:28,693 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:29:28,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:29:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 05:29:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:29:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:29:28,704 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-14 05:29:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:28,705 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:29:28,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:29:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:29:28,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:28,706 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:28,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:29:28,707 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:28,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1153024700, now seen corresponding path program 13 times [2020-10-14 05:29:28,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:28,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499021830] [2020-10-14 05:29:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:28,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:29,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:29,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:29,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:29,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:29:29,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:29,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:29,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:29,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:29,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:29,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:29,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:29,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:29,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:29,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:29,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:29:29,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499021830] [2020-10-14 05:29:29,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:29,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:29,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920399357] [2020-10-14 05:29:29,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:29,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:29,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:29,538 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2020-10-14 05:29:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:29,580 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 05:29:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:29,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 05:29:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:29,582 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:29:29,582 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:29:29,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:29:29,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:29:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:29:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:29:29,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2020-10-14 05:29:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:29,590 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:29:29,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:29:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:29:29,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:29,592 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:29,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:29:29,592 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 656186873, now seen corresponding path program 14 times [2020-10-14 05:29:29,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:29,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890295440] [2020-10-14 05:29:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:29,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:29,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:30,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:29:30,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:30,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:29:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:30,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:30,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:30,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-14 05:29:30,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890295440] [2020-10-14 05:29:30,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:30,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:30,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183304021] [2020-10-14 05:29:30,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:30,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:30,699 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-14 05:29:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:30,751 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-14 05:29:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:30,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-14 05:29:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:30,753 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:29:30,753 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:29:30,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:29:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 05:29:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:29:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-14 05:29:30,764 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 40 [2020-10-14 05:29:30,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:30,764 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-14 05:29:30,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-14 05:29:30,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:29:30,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:30,766 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:30,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:29:30,766 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:30,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:30,767 INFO L82 PathProgramCache]: Analyzing trace with hash -881243468, now seen corresponding path program 15 times [2020-10-14 05:29:30,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:30,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335830399] [2020-10-14 05:29:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:30,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:31,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:31,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:29:31,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:31,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-14 05:29:31,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:31,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:31,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:29:31,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:31,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:31,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:31,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:31,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:31,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:31,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 05:29:31,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335830399] [2020-10-14 05:29:31,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:31,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:31,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060493541] [2020-10-14 05:29:31,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:31,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:31,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:31,859 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 9 states. [2020-10-14 05:29:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:31,888 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-10-14 05:29:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:31,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:29:31,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:31,890 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:29:31,890 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:29:31,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:29:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2020-10-14 05:29:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:29:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-14 05:29:31,903 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 42 [2020-10-14 05:29:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:31,903 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-14 05:29:31,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-14 05:29:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:29:31,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:31,904 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:31,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:29:31,905 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1513205972, now seen corresponding path program 16 times [2020-10-14 05:29:31,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:31,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70743744] [2020-10-14 05:29:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:31,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:32,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:33,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:33,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:29:33,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:33,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-10-14 05:29:33,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:33,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:33,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:29:33,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:33,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:29:33,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:33,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:33,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:33,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:33,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:33,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:33,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:29:33,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70743744] [2020-10-14 05:29:33,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:33,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:33,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754904077] [2020-10-14 05:29:33,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:33,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:33,121 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2020-10-14 05:29:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:33,179 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-14 05:29:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:33,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-14 05:29:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:33,181 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:29:33,181 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:29:33,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:29:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 05:29:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:29:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 05:29:33,188 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2020-10-14 05:29:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:33,189 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 05:29:33,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 05:29:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:29:33,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:33,190 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:33,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:29:33,190 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:33,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash 236188175, now seen corresponding path program 17 times [2020-10-14 05:29:33,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:33,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379127615] [2020-10-14 05:29:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:33,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:34,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:29:34,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:34,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1209 [2020-10-14 05:29:34,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:34,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:34,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:34,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:34,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:29:34,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:34,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:34,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:34,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:34,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:34,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:34,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:29:34,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379127615] [2020-10-14 05:29:34,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:34,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:29:34,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125992166] [2020-10-14 05:29:34,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:29:34,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:29:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:34,582 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2020-10-14 05:29:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:34,656 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-14 05:29:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:34,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-14 05:29:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:34,658 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:29:34,658 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:29:34,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:29:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-14 05:29:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:29:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-14 05:29:34,667 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 45 [2020-10-14 05:29:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:34,668 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-14 05:29:34,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-14 05:29:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:29:34,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:34,669 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:34,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:29:34,670 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2071750706, now seen corresponding path program 18 times [2020-10-14 05:29:34,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:34,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738882513] [2020-10-14 05:29:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:36,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:29:36,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:36,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-14 05:29:36,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:36,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:36,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:29:36,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:29:36,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:36,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:36,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:36,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:36,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:36,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:29:36,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738882513] [2020-10-14 05:29:36,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:36,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:36,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568222159] [2020-10-14 05:29:36,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:36,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:36,086 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-14 05:29:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:36,137 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 05:29:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:36,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-14 05:29:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:36,139 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:29:36,140 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:29:36,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:36,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:29:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-14 05:29:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:29:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-14 05:29:36,151 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 47 [2020-10-14 05:29:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:36,151 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-14 05:29:36,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-14 05:29:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:29:36,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:36,154 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:36,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:29:36,154 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash -989653993, now seen corresponding path program 19 times [2020-10-14 05:29:36,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:36,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313085423] [2020-10-14 05:29:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:36,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:37,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:29:37,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:37,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-14 05:29:37,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:37,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:37,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:29:37,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:37,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:37,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:37,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:37,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:37,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:37,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:37,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:37,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:37,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:37,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-14 05:29:37,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313085423] [2020-10-14 05:29:37,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:37,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:37,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743327065] [2020-10-14 05:29:37,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:37,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:37,349 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-10-14 05:29:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:37,404 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-14 05:29:37,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:29:37,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-14 05:29:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:37,405 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:29:37,406 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:29:37,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:29:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 05:29:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:29:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-14 05:29:37,411 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2020-10-14 05:29:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:37,412 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-14 05:29:37,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:29:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-14 05:29:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:29:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:37,413 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:37,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:29:37,413 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1087520582, now seen corresponding path program 20 times [2020-10-14 05:29:37,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:37,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070782103] [2020-10-14 05:29:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:37,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:37,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:38,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:29:38,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:38,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1356 [2020-10-14 05:29:38,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:38,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:29:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:29:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:38,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:38,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:38,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:38,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:38,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:38,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:38,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:38,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:38,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 165 proven. 49 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-14 05:29:38,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070782103] [2020-10-14 05:29:38,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:38,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:38,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567595444] [2020-10-14 05:29:38,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:38,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:38,842 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-10-14 05:29:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:38,894 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-14 05:29:38,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:38,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-14 05:29:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:38,895 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:29:38,895 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:29:38,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:29:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-14 05:29:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:29:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-14 05:29:38,900 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2020-10-14 05:29:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:38,901 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-14 05:29:38,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-14 05:29:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:29:38,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:38,901 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:38,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:29:38,902 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash -507483489, now seen corresponding path program 21 times [2020-10-14 05:29:38,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:38,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59825666] [2020-10-14 05:29:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:38,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1244 [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:40,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:29:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:40,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:29:40,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:40,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:40,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:40,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:40,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 229 proven. 10 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-14 05:29:40,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59825666] [2020-10-14 05:29:40,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:40,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:40,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868103763] [2020-10-14 05:29:40,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:40,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:40,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:40,239 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 11 states. [2020-10-14 05:29:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:40,278 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2020-10-14 05:29:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:40,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-14 05:29:40,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:40,279 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:29:40,280 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:29:40,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:29:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 55. [2020-10-14 05:29:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:29:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:29:40,285 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 53 [2020-10-14 05:29:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:40,285 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:29:40,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:29:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:29:40,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:40,286 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:40,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:29:40,287 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1483418785, now seen corresponding path program 22 times [2020-10-14 05:29:40,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:40,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138523822] [2020-10-14 05:29:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:40,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:41,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:29:41,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:29:41,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:41,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:41,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:41,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:41,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:41,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:41,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:41,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:29:41,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138523822] [2020-10-14 05:29:41,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:41,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:29:41,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825897838] [2020-10-14 05:29:41,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:29:41,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:29:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:41,752 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 14 states. [2020-10-14 05:29:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:41,796 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-10-14 05:29:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:29:41,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 05:29:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:41,797 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:29:41,797 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:29:41,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:29:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:29:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:29:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:29:41,801 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2020-10-14 05:29:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:41,802 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:29:41,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:29:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:29:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:29:41,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:41,803 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:29:41,803 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1070469666, now seen corresponding path program 23 times [2020-10-14 05:29:41,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:41,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461660189] [2020-10-14 05:29:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:42,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:29:42,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:43,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:43,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:29:43,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461660189] [2020-10-14 05:29:43,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:43,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:29:43,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267214967] [2020-10-14 05:29:43,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:29:43,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:29:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:43,141 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 15 states. [2020-10-14 05:29:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,231 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-14 05:29:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:29:43,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-14 05:29:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,233 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:29:43,234 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:29:43,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:29:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:29:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 05:29:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:29:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-14 05:29:43,248 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 56 [2020-10-14 05:29:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:43,249 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-14 05:29:43,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:29:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-14 05:29:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:29:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:43,250 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:43,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:29:43,251 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1364022235, now seen corresponding path program 24 times [2020-10-14 05:29:43,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:43,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768453336] [2020-10-14 05:29:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2746 [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:29:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:29:46,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:29:46,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:46,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:46,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:46,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:46,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 221 proven. 64 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-14 05:29:46,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768453336] [2020-10-14 05:29:46,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:46,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:46,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572006777] [2020-10-14 05:29:46,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:46,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:46,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:46,100 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2020-10-14 05:29:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:46,163 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-14 05:29:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:46,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-14 05:29:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:46,164 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:29:46,164 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:29:46,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:29:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 05:29:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:29:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-14 05:29:46,170 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 58 [2020-10-14 05:29:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:46,171 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-14 05:29:46,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-14 05:29:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:29:46,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:46,171 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:46,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:29:46,172 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash -355910314, now seen corresponding path program 25 times [2020-10-14 05:29:46,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:46,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673224887] [2020-10-14 05:29:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:48,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:29:48,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:48,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:48,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:48,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:48,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:48,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:48,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:48,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:48,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:48,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-14 05:29:48,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673224887] [2020-10-14 05:29:48,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:48,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:29:48,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106314599] [2020-10-14 05:29:48,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:29:48,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:29:48,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:29:48,381 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 16 states. [2020-10-14 05:29:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:48,463 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-10-14 05:29:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:29:48,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-14 05:29:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:48,464 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:29:48,464 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:29:48,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:29:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:29:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 05:29:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:29:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-14 05:29:48,473 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 60 [2020-10-14 05:29:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:48,474 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-14 05:29:48,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:29:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-14 05:29:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:29:48,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:48,475 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:48,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:29:48,475 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:48,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:48,476 INFO L82 PathProgramCache]: Analyzing trace with hash 328686803, now seen corresponding path program 26 times [2020-10-14 05:29:48,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:48,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642294960] [2020-10-14 05:29:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:48,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:49,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:29:50,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:50,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:50,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:50,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:50,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:50,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:50,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 266 proven. 81 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:29:50,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642294960] [2020-10-14 05:29:50,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:50,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:29:50,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000492350] [2020-10-14 05:29:50,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:29:50,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:29:50,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:50,266 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 12 states. [2020-10-14 05:29:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:50,345 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-14 05:29:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:50,346 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 05:29:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:50,346 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:29:50,347 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:29:50,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:29:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 05:29:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:29:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-14 05:29:50,355 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 62 [2020-10-14 05:29:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:50,356 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-14 05:29:50,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-14 05:29:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:29:50,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:50,357 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:50,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:29:50,358 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1119152206, now seen corresponding path program 27 times [2020-10-14 05:29:50,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:50,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916232643] [2020-10-14 05:29:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:52,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:29:52,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:29:52,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:52,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:52,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:52,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:52,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:52,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 05:29:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916232643] [2020-10-14 05:29:52,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:52,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:29:52,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167651652] [2020-10-14 05:29:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:29:52,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:29:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:52,242 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 17 states. [2020-10-14 05:29:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:52,334 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-14 05:29:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:29:52,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-10-14 05:29:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:52,337 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:29:52,337 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:29:52,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:29:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:29:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:29:52,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:29:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-14 05:29:52,343 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 64 [2020-10-14 05:29:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:52,343 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-14 05:29:52,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:29:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-14 05:29:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:29:52,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:52,344 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:52,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:29:52,345 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 272433483, now seen corresponding path program 28 times [2020-10-14 05:29:52,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:52,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159578399] [2020-10-14 05:29:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:52,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1668 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:29:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:29:54,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:54,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:54,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:54,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:54,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:54,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:54,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 05:29:54,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159578399] [2020-10-14 05:29:54,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:54,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:54,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024803218] [2020-10-14 05:29:54,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:54,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:54,128 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 13 states. [2020-10-14 05:29:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:54,199 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-14 05:29:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:29:54,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-14 05:29:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:54,204 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:29:54,204 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:29:54,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:29:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 05:29:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:29:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-14 05:29:54,211 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 66 [2020-10-14 05:29:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:54,211 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-14 05:29:54,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:29:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-14 05:29:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:29:54,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:54,212 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:54,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:29:54,212 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:54,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1400680762, now seen corresponding path program 29 times [2020-10-14 05:29:54,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:54,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6886310] [2020-10-14 05:29:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:54,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:56,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:29:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:56,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:29:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:56,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:56,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:56,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:56,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:56,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:56,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:56,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 436 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-14 05:29:56,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6886310] [2020-10-14 05:29:56,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:56,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:29:56,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364552523] [2020-10-14 05:29:56,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:29:56,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:29:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:56,229 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 14 states. [2020-10-14 05:29:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:56,301 INFO L93 Difference]: Finished difference Result 207 states and 285 transitions. [2020-10-14 05:29:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:29:56,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-14 05:29:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:56,303 INFO L225 Difference]: With dead ends: 207 [2020-10-14 05:29:56,303 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 05:29:56,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:29:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 05:29:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 70. [2020-10-14 05:29:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:29:56,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-14 05:29:56,312 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 68 [2020-10-14 05:29:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:56,313 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-14 05:29:56,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:29:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-14 05:29:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 05:29:56,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:56,314 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:56,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:29:56,314 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash -435892902, now seen corresponding path program 30 times [2020-10-14 05:29:56,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:56,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516626480] [2020-10-14 05:29:56,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:56,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:29:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2347 [2020-10-14 05:29:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:58,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:29:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:29:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:58,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:58,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:58,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:58,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:58,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:58,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:58,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:58,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:29:58,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516626480] [2020-10-14 05:29:58,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:58,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:29:58,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799394271] [2020-10-14 05:29:58,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:29:58,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:29:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:29:58,851 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 18 states. [2020-10-14 05:29:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:58,946 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2020-10-14 05:29:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:29:58,947 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-14 05:29:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:58,948 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:29:58,948 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:29:58,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:29:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:29:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-14 05:29:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:29:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-14 05:29:58,957 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 69 [2020-10-14 05:29:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:58,957 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-14 05:29:58,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:29:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-14 05:29:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:29:58,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:58,958 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:58,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:29:58,959 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -242890115, now seen corresponding path program 31 times [2020-10-14 05:29:58,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:58,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598561967] [2020-10-14 05:29:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:01,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:30:01,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:01,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:01,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:01,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:01,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:01,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:30:01,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598561967] [2020-10-14 05:30:01,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:01,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:01,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806822134] [2020-10-14 05:30:01,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:01,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:01,202 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 19 states. [2020-10-14 05:30:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:01,297 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-10-14 05:30:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:01,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-14 05:30:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:01,298 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:30:01,299 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:30:01,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:30:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-14 05:30:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:30:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-14 05:30:01,307 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 71 [2020-10-14 05:30:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:01,307 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-14 05:30:01,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-14 05:30:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 05:30:01,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:01,308 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:01,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:30:01,308 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash 549194464, now seen corresponding path program 32 times [2020-10-14 05:30:01,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:01,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490637719] [2020-10-14 05:30:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:03,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 05:30:03,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:03,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2398 [2020-10-14 05:30:03,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:03,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:30:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:30:03,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:30:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:03,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:03,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:03,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:03,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:03,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:03,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:03,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 391 proven. 121 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-10-14 05:30:03,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490637719] [2020-10-14 05:30:03,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:03,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:30:03,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095482817] [2020-10-14 05:30:03,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:30:03,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:03,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:30:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:03,848 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 14 states. [2020-10-14 05:30:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:03,927 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-14 05:30:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:30:03,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-14 05:30:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:03,928 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:30:03,928 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:30:03,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:30:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-14 05:30:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:30:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-14 05:30:03,937 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2020-10-14 05:30:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:03,937 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-14 05:30:03,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:30:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-14 05:30:03,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:30:03,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:03,938 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:03,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:30:03,939 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 689257989, now seen corresponding path program 33 times [2020-10-14 05:30:03,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:03,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671409563] [2020-10-14 05:30:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:03,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:04,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:06,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:06,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:30:06,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2578 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:30:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:06,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:06,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:06,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:06,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:06,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:06,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:06,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-10-14 05:30:06,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671409563] [2020-10-14 05:30:06,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:06,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:30:06,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30497491] [2020-10-14 05:30:06,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:30:06,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:30:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:30:06,752 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 20 states. [2020-10-14 05:30:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:06,849 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-10-14 05:30:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:30:06,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-14 05:30:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:06,852 INFO L225 Difference]: With dead ends: 115 [2020-10-14 05:30:06,852 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:30:06,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:30:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:30:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 05:30:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:30:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-14 05:30:06,865 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 75 [2020-10-14 05:30:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:06,865 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-14 05:30:06,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:30:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-14 05:30:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 05:30:06,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:06,866 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:06,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:30:06,867 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:06,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1486787816, now seen corresponding path program 34 times [2020-10-14 05:30:06,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:06,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197486448] [2020-10-14 05:30:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:06,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:09,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:09,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 05:30:09,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-10-14 05:30:09,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:09,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:30:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 05:30:09,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:30:09,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:09,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:09,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:09,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:09,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 450 proven. 144 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-14 05:30:09,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197486448] [2020-10-14 05:30:09,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:09,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:30:09,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974215430] [2020-10-14 05:30:09,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:30:09,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:30:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:09,732 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 15 states. [2020-10-14 05:30:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:09,820 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-14 05:30:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:30:09,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-14 05:30:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:09,822 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:30:09,822 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:30:09,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:30:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-14 05:30:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:30:09,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-14 05:30:09,829 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 77 [2020-10-14 05:30:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:09,829 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-14 05:30:09,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:30:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-14 05:30:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 05:30:09,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:09,830 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:09,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:30:09,831 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash -226662899, now seen corresponding path program 35 times [2020-10-14 05:30:09,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:09,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60464881] [2020-10-14 05:30:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:09,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2914 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:12,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:30:12,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:12,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:30:12,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:12,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:12,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:12,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:12,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:12,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 619 proven. 21 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-14 05:30:12,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60464881] [2020-10-14 05:30:12,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:12,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700627948] [2020-10-14 05:30:12,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:12,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:12,904 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 16 states. [2020-10-14 05:30:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:12,975 INFO L93 Difference]: Finished difference Result 268 states and 373 transitions. [2020-10-14 05:30:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:12,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-14 05:30:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:12,977 INFO L225 Difference]: With dead ends: 268 [2020-10-14 05:30:12,977 INFO L226 Difference]: Without dead ends: 263 [2020-10-14 05:30:12,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-14 05:30:12,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 81. [2020-10-14 05:30:12,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:30:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-14 05:30:12,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 79 [2020-10-14 05:30:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:12,986 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-14 05:30:12,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-14 05:30:12,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:30:12,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:12,987 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:12,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:30:12,988 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1598922483, now seen corresponding path program 36 times [2020-10-14 05:30:12,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:12,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134112765] [2020-10-14 05:30:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:13,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:13,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:16,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3459 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:30:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:30:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:16,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:16,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:16,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:16,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:16,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:16,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:16,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:16,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:16,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:16,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 475 proven. 342 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:16,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134112765] [2020-10-14 05:30:16,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:16,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:30:16,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135843361] [2020-10-14 05:30:16,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:30:16,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:30:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:16,684 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 21 states. [2020-10-14 05:30:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:16,765 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-10-14 05:30:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:30:16,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 80 [2020-10-14 05:30:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:16,767 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:30:16,767 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:30:16,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:30:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 05:30:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:30:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-14 05:30:16,776 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 80 [2020-10-14 05:30:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:16,776 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-14 05:30:16,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:30:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-14 05:30:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:30:16,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:16,777 INFO L422 BasicCegarLoop]: trace histogram [32, 19, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:16,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:30:16,778 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1048175120, now seen corresponding path program 37 times [2020-10-14 05:30:16,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:16,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122205507] [2020-10-14 05:30:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:16,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3447 [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:20,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:30:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:20,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:30:20,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:20,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:20,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:20,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:20,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:20,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:20,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 500 proven. 380 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:20,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122205507] [2020-10-14 05:30:20,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:20,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:30:20,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287021356] [2020-10-14 05:30:20,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:30:20,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:30:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:20,478 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 22 states. [2020-10-14 05:30:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:20,565 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-10-14 05:30:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:30:20,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-10-14 05:30:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:20,567 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:30:20,567 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:30:20,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:20,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:30:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-14 05:30:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:30:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-14 05:30:20,576 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 82 [2020-10-14 05:30:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:20,576 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-14 05:30:20,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:30:20,576 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-14 05:30:20,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:30:20,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:20,577 INFO L422 BasicCegarLoop]: trace histogram [33, 20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:20,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:30:20,578 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:20,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:20,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2006634925, now seen corresponding path program 38 times [2020-10-14 05:30:20,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:20,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774175635] [2020-10-14 05:30:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:24,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:24,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:30:24,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:24,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3557 [2020-10-14 05:30:24,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:24,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:30:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 05:30:24,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:30:24,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:24,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:24,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:24,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:24,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:24,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:24,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 540 proven. 169 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-14 05:30:24,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774175635] [2020-10-14 05:30:24,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:24,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:24,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152000908] [2020-10-14 05:30:24,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:24,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:24,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:24,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:24,282 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 16 states. [2020-10-14 05:30:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:24,374 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-14 05:30:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:24,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-10-14 05:30:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:24,377 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:30:24,377 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:30:24,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:30:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 05:30:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:30:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-14 05:30:24,386 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 84 [2020-10-14 05:30:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:24,387 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-14 05:30:24,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-14 05:30:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:30:24,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:24,388 INFO L422 BasicCegarLoop]: trace histogram [34, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:24,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:30:24,388 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:24,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1450349592, now seen corresponding path program 39 times [2020-10-14 05:30:24,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:24,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349473938] [2020-10-14 05:30:24,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:24,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:25,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3814 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:30:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:30:28,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:28,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:28,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:28,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:28,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:28,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 567 proven. 420 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:30:28,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349473938] [2020-10-14 05:30:28,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:28,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:30:28,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61822403] [2020-10-14 05:30:28,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:30:28,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:30:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:28,493 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 23 states. [2020-10-14 05:30:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:28,608 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-10-14 05:30:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:30:28,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-14 05:30:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:28,611 INFO L225 Difference]: With dead ends: 131 [2020-10-14 05:30:28,611 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:30:28,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:30:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-14 05:30:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:30:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-10-14 05:30:28,628 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 86 [2020-10-14 05:30:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:28,628 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-10-14 05:30:28,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:30:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-10-14 05:30:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:30:28,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:28,633 INFO L422 BasicCegarLoop]: trace histogram [35, 21, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:28,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:30:28,633 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash 444070181, now seen corresponding path program 40 times [2020-10-14 05:30:28,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:28,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98512548] [2020-10-14 05:30:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:28,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:30,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:32,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:32,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4248 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:30:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:33,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:33,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:33,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:33,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 609 proven. 196 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-14 05:30:33,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98512548] [2020-10-14 05:30:33,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:33,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:30:33,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332414848] [2020-10-14 05:30:33,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:30:33,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:30:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:33,054 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 17 states. [2020-10-14 05:30:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:33,152 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2020-10-14 05:30:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:30:33,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-14 05:30:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:33,153 INFO L225 Difference]: With dead ends: 105 [2020-10-14 05:30:33,153 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:30:33,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:30:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 05:30:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:30:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-14 05:30:33,161 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 88 [2020-10-14 05:30:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:33,162 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-14 05:30:33,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:30:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-14 05:30:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:30:33,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:33,163 INFO L422 BasicCegarLoop]: trace histogram [36, 21, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:33,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:30:33,163 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash 163485024, now seen corresponding path program 41 times [2020-10-14 05:30:33,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:33,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117848724] [2020-10-14 05:30:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:33,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:37,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:37,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:30:37,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4487 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:30:37,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:37,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:37,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:37,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:37,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:37,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 638 proven. 462 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-14 05:30:37,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117848724] [2020-10-14 05:30:37,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:37,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:30:37,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622724725] [2020-10-14 05:30:37,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:30:37,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:37,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:30:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:37,938 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 24 states. [2020-10-14 05:30:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:38,009 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-10-14 05:30:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:30:38,010 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2020-10-14 05:30:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:38,011 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:30:38,011 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:30:38,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:30:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-14 05:30:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:30:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-10-14 05:30:38,020 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 90 [2020-10-14 05:30:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:38,020 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-10-14 05:30:38,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:30:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-10-14 05:30:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:30:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:38,021 INFO L422 BasicCegarLoop]: trace histogram [37, 22, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:38,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:30:38,022 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1141490659, now seen corresponding path program 42 times [2020-10-14 05:30:38,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:38,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114989887] [2020-10-14 05:30:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:38,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4838 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:30:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 05:30:42,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:30:42,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:43,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:43,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:43,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:43,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 682 proven. 225 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-10-14 05:30:43,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114989887] [2020-10-14 05:30:43,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:43,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:30:43,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008003227] [2020-10-14 05:30:43,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:30:43,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:30:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:43,040 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 18 states. [2020-10-14 05:30:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:43,141 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-14 05:30:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:30:43,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-10-14 05:30:43,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:43,143 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:30:43,143 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:30:43,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:43,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:30:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 05:30:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:30:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-14 05:30:43,149 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 92 [2020-10-14 05:30:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:43,150 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-14 05:30:43,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:30:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-14 05:30:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:30:43,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:43,151 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:43,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:30:43,151 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:43,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:43,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1152907864, now seen corresponding path program 43 times [2020-10-14 05:30:43,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:43,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663681518] [2020-10-14 05:30:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:46,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:48,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:48,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:30:48,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:48,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 05:30:48,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:48,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:48,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:48,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:48,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:48,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 938 proven. 28 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-14 05:30:48,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663681518] [2020-10-14 05:30:48,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:48,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:48,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035172289] [2020-10-14 05:30:48,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:48,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:48,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:48,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:48,358 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 19 states. [2020-10-14 05:30:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:48,450 INFO L93 Difference]: Finished difference Result 374 states and 528 transitions. [2020-10-14 05:30:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:48,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-14 05:30:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:48,454 INFO L225 Difference]: With dead ends: 374 [2020-10-14 05:30:48,454 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 05:30:48,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 05:30:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 97. [2020-10-14 05:30:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:30:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-14 05:30:48,465 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 94 [2020-10-14 05:30:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:48,465 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-14 05:30:48,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-14 05:30:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:30:48,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:48,466 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:48,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:30:48,466 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash 980103256, now seen corresponding path program 44 times [2020-10-14 05:30:48,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:48,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988759343] [2020-10-14 05:30:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:48,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:48,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:50,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:53,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:30:53,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:53,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:30:53,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:53,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:30:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:53,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:30:53,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:53,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:53,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 713 proven. 506 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:30:53,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988759343] [2020-10-14 05:30:53,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:53,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:30:53,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946384786] [2020-10-14 05:30:53,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:30:53,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:53,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:30:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:30:53,798 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 25 states. [2020-10-14 05:30:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:53,915 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2020-10-14 05:30:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:30:53,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-10-14 05:30:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:53,916 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:30:53,917 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 05:30:53,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:30:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 05:30:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-14 05:30:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:30:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-14 05:30:53,925 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 96 [2020-10-14 05:30:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:53,925 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-14 05:30:53,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:30:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-14 05:30:53,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:30:53,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:53,926 INFO L422 BasicCegarLoop]: trace histogram [39, 23, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:53,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:30:53,926 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2143819093, now seen corresponding path program 45 times [2020-10-14 05:30:53,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:53,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255532776] [2020-10-14 05:30:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:53,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:53,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:30:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:58,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:30:58,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:59,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:59,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:59,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:59,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:59,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:59,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:59,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 744 proven. 552 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:30:59,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255532776] [2020-10-14 05:30:59,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:59,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:30:59,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710724961] [2020-10-14 05:30:59,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:30:59,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:30:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:30:59,323 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 26 states. [2020-10-14 05:30:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:59,431 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2020-10-14 05:30:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:30:59,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-10-14 05:30:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:59,432 INFO L225 Difference]: With dead ends: 149 [2020-10-14 05:30:59,432 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:30:59,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:30:59,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:30:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-14 05:30:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:30:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2020-10-14 05:30:59,442 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 98 [2020-10-14 05:30:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:59,443 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2020-10-14 05:30:59,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:30:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2020-10-14 05:30:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:30:59,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:59,444 INFO L422 BasicCegarLoop]: trace histogram [40, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:59,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:30:59,444 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash -511725806, now seen corresponding path program 46 times [2020-10-14 05:30:59,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:59,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298060470] [2020-10-14 05:30:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:59,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:04,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:04,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:31:04,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:04,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:04,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:04,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:04,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:04,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:04,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:04,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:04,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:04,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:04,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:04,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:04,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 792 proven. 256 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2020-10-14 05:31:04,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298060470] [2020-10-14 05:31:04,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:04,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:31:04,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947170611] [2020-10-14 05:31:04,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:31:04,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:31:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:04,656 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 19 states. [2020-10-14 05:31:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:04,762 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-10-14 05:31:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:31:04,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-14 05:31:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:04,763 INFO L225 Difference]: With dead ends: 119 [2020-10-14 05:31:04,763 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:31:04,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:31:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 05:31:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:31:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-10-14 05:31:04,773 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 100 [2020-10-14 05:31:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:04,773 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-10-14 05:31:04,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:31:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-10-14 05:31:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:31:04,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:04,774 INFO L422 BasicCegarLoop]: trace histogram [41, 24, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:04,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:31:04,774 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 659362125, now seen corresponding path program 47 times [2020-10-14 05:31:04,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:04,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404206387] [2020-10-14 05:31:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:04,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:09,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:31:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:10,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:10,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:10,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:10,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:10,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 825 proven. 600 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 05:31:10,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404206387] [2020-10-14 05:31:10,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:10,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:31:10,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738728763] [2020-10-14 05:31:10,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:31:10,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:10,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:31:10,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:31:10,155 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 27 states. [2020-10-14 05:31:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:10,286 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2020-10-14 05:31:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:31:10,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-10-14 05:31:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:10,288 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:31:10,288 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:31:10,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:31:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:31:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-14 05:31:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 05:31:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-10-14 05:31:10,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 102 [2020-10-14 05:31:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:10,298 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-10-14 05:31:10,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:31:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-10-14 05:31:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:31:10,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:10,299 INFO L422 BasicCegarLoop]: trace histogram [42, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:10,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:31:10,299 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:10,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1274512522, now seen corresponding path program 48 times [2020-10-14 05:31:10,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:10,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917518660] [2020-10-14 05:31:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:10,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:10,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:15,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:31:15,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 05:31:15,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:31:15,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:15,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:15,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:15,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:15,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:15,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:15,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 875 proven. 289 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-14 05:31:15,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917518660] [2020-10-14 05:31:15,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:15,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:31:15,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65675547] [2020-10-14 05:31:15,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:31:15,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:15,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:31:15,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:15,546 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 20 states. [2020-10-14 05:31:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:15,662 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-14 05:31:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:31:15,664 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-10-14 05:31:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:15,665 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:31:15,666 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 05:31:15,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:15,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 05:31:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 05:31:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:31:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-14 05:31:15,674 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 104 [2020-10-14 05:31:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:15,675 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-14 05:31:15,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:31:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-14 05:31:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:31:15,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:15,675 INFO L422 BasicCegarLoop]: trace histogram [43, 25, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:15,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:31:15,675 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash -752523067, now seen corresponding path program 49 times [2020-10-14 05:31:15,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:15,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730546002] [2020-10-14 05:31:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:15,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:18,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:20,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:20,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:31:20,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:31:20,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:21,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:21,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:21,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 910 proven. 650 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:21,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730546002] [2020-10-14 05:31:21,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:21,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:31:21,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776777896] [2020-10-14 05:31:21,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:31:21,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:31:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:21,084 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 28 states. [2020-10-14 05:31:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:21,216 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2020-10-14 05:31:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:31:21,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-10-14 05:31:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:21,218 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:31:21,218 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:31:21,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:31:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 05:31:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:31:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-14 05:31:21,228 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 106 [2020-10-14 05:31:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:21,228 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-14 05:31:21,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:31:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-14 05:31:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:31:21,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:21,230 INFO L422 BasicCegarLoop]: trace histogram [44, 26, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:21,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:31:21,230 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:21,231 INFO L82 PathProgramCache]: Analyzing trace with hash -356911742, now seen corresponding path program 50 times [2020-10-14 05:31:21,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:21,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653519536] [2020-10-14 05:31:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:21,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:23,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:31:26,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:31:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:26,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:26,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:26,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:26,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 945 proven. 702 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:26,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653519536] [2020-10-14 05:31:26,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:26,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:31:26,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464886017] [2020-10-14 05:31:26,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:31:26,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:31:26,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:26,667 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 29 states. [2020-10-14 05:31:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:26,796 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-10-14 05:31:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:31:26,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2020-10-14 05:31:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:26,797 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:31:26,797 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 05:31:26,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 05:31:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-14 05:31:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 05:31:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-10-14 05:31:26,808 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 108 [2020-10-14 05:31:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:26,808 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-10-14 05:31:26,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:31:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-10-14 05:31:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:31:26,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:26,809 INFO L422 BasicCegarLoop]: trace histogram [45, 27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:26,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:31:26,810 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1868449535, now seen corresponding path program 51 times [2020-10-14 05:31:26,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:26,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094734997] [2020-10-14 05:31:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:26,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:26,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:31,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-14 05:31:31,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:31:31,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:32,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:32,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:32,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:32,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 999 proven. 324 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2020-10-14 05:31:32,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094734997] [2020-10-14 05:31:32,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:32,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:31:32,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513570268] [2020-10-14 05:31:32,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:31:32,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:31:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:32,058 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 21 states. [2020-10-14 05:31:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:32,204 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2020-10-14 05:31:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:31:32,205 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-10-14 05:31:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:32,206 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:31:32,206 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:31:32,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:31:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 05:31:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:31:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2020-10-14 05:31:32,224 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 110 [2020-10-14 05:31:32,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:32,227 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2020-10-14 05:31:32,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:31:32,227 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2020-10-14 05:31:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:31:32,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:32,228 INFO L422 BasicCegarLoop]: trace histogram [46, 27, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:32,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:31:32,229 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1209703942, now seen corresponding path program 52 times [2020-10-14 05:31:32,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:32,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571651977] [2020-10-14 05:31:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:32,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:31:37,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:37,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:31:37,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:37,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:37,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 1036 proven. 756 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-10-14 05:31:37,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571651977] [2020-10-14 05:31:37,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:37,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:31:37,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696185087] [2020-10-14 05:31:37,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:31:37,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:31:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:37,714 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand 30 states. [2020-10-14 05:31:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:37,848 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2020-10-14 05:31:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:31:37,850 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-10-14 05:31:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:37,851 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:31:37,851 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:31:37,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:31:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-14 05:31:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:31:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2020-10-14 05:31:37,860 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 112 [2020-10-14 05:31:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:37,860 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2020-10-14 05:31:37,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:31:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2020-10-14 05:31:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:31:37,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:37,861 INFO L422 BasicCegarLoop]: trace histogram [47, 28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:37,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:31:37,861 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:37,861 INFO L82 PathProgramCache]: Analyzing trace with hash -958747401, now seen corresponding path program 53 times [2020-10-14 05:31:37,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:37,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35793188] [2020-10-14 05:31:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:37,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:42,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:31:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 05:31:42,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:31:42,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:43,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:43,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:43,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:43,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:43,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:43,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 1092 proven. 361 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-14 05:31:43,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35793188] [2020-10-14 05:31:43,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:43,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:31:43,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393733440] [2020-10-14 05:31:43,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:31:43,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:31:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:31:43,134 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 22 states. [2020-10-14 05:31:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:43,273 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-14 05:31:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:31:43,273 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-14 05:31:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:43,275 INFO L225 Difference]: With dead ends: 133 [2020-10-14 05:31:43,275 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:31:43,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:31:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:31:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 05:31:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:31:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-14 05:31:43,284 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 114 [2020-10-14 05:31:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:43,284 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-14 05:31:43,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:31:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-14 05:31:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:31:43,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:43,285 INFO L422 BasicCegarLoop]: trace histogram [48, 28, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:43,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:31:43,285 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 568338930, now seen corresponding path program 54 times [2020-10-14 05:31:43,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:43,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798424876] [2020-10-14 05:31:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:43,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:47,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:48,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:48,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:31:48,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:48,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:31:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:48,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:48,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:48,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:48,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:48,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:48,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 1131 proven. 812 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-14 05:31:48,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798424876] [2020-10-14 05:31:48,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:48,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:31:48,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465880849] [2020-10-14 05:31:48,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:31:48,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:31:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:31:48,798 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 31 states. [2020-10-14 05:31:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:48,944 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2020-10-14 05:31:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:31:48,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2020-10-14 05:31:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:48,946 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:31:48,946 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:31:48,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:31:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:31:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 05:31:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:31:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-14 05:31:48,958 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 116 [2020-10-14 05:31:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:48,959 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-14 05:31:48,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:31:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-14 05:31:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:31:48,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:48,960 INFO L422 BasicCegarLoop]: trace histogram [49, 29, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:48,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:31:48,960 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:48,961 INFO L82 PathProgramCache]: Analyzing trace with hash -821186961, now seen corresponding path program 55 times [2020-10-14 05:31:48,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:48,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097893092] [2020-10-14 05:31:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:53,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:53,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:31:53,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:31:53,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:53,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:53,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:31:53,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-14 05:31:53,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:31:53,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:54,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:54,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:54,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:54,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:54,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:54,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:54,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 1189 proven. 400 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-10-14 05:31:54,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097893092] [2020-10-14 05:31:54,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:54,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:31:54,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16867641] [2020-10-14 05:31:54,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:31:54,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:31:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:31:54,262 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 23 states. [2020-10-14 05:31:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:54,395 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2020-10-14 05:31:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:31:54,396 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-10-14 05:31:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:54,397 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:31:54,397 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 05:31:54,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:31:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 05:31:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 05:31:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:31:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-14 05:31:54,410 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 118 [2020-10-14 05:31:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:54,410 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-14 05:31:54,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:31:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-14 05:31:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:31:54,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:54,411 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:54,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:31:54,411 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:54,412 INFO L82 PathProgramCache]: Analyzing trace with hash -380064406, now seen corresponding path program 56 times [2020-10-14 05:31:54,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:54,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413050742] [2020-10-14 05:31:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:54,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:31:59,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:59,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 05:31:59,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:59,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:59,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:59,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:59,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:59,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:59,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1630 proven. 45 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-14 05:31:59,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413050742] [2020-10-14 05:31:59,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:59,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:31:59,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785512368] [2020-10-14 05:31:59,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:31:59,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:59,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:31:59,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:31:59,768 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 24 states. [2020-10-14 05:31:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:59,909 INFO L93 Difference]: Finished difference Result 590 states and 844 transitions. [2020-10-14 05:31:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:31:59,909 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-10-14 05:31:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:59,913 INFO L225 Difference]: With dead ends: 590 [2020-10-14 05:31:59,913 INFO L226 Difference]: Without dead ends: 585 [2020-10-14 05:31:59,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:31:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-14 05:31:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 123. [2020-10-14 05:31:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:31:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2020-10-14 05:31:59,930 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 120 [2020-10-14 05:31:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:59,931 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2020-10-14 05:31:59,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:31:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2020-10-14 05:31:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:31:59,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:59,932 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:59,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:31:59,932 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash 967534314, now seen corresponding path program 57 times [2020-10-14 05:31:59,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:59,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909152574] [2020-10-14 05:31:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:04,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:04,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:04,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:32:04,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:04,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:32:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:05,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:05,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:05,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:05,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:05,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:05,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2566 backedges. 1230 proven. 870 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:32:05,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909152574] [2020-10-14 05:32:05,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:05,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:32:05,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063797898] [2020-10-14 05:32:05,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:32:05,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:32:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:32:05,493 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand 32 states. [2020-10-14 05:32:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:05,655 INFO L93 Difference]: Finished difference Result 185 states and 230 transitions. [2020-10-14 05:32:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:32:05,656 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2020-10-14 05:32:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:05,658 INFO L225 Difference]: With dead ends: 185 [2020-10-14 05:32:05,658 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:32:05,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:32:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:32:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-14 05:32:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:32:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2020-10-14 05:32:05,671 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 122 [2020-10-14 05:32:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:05,671 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2020-10-14 05:32:05,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:32:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2020-10-14 05:32:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:32:05,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:05,673 INFO L422 BasicCegarLoop]: trace histogram [51, 30, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:05,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:32:05,673 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 470866343, now seen corresponding path program 58 times [2020-10-14 05:32:05,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:05,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138382012] [2020-10-14 05:32:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:05,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:05,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:10,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:32:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:11,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:11,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:11,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 1271 proven. 930 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:32:11,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138382012] [2020-10-14 05:32:11,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:11,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:32:11,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200611855] [2020-10-14 05:32:11,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:32:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:32:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:32:11,324 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand 33 states. [2020-10-14 05:32:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:11,479 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2020-10-14 05:32:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:32:11,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2020-10-14 05:32:11,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:11,484 INFO L225 Difference]: With dead ends: 187 [2020-10-14 05:32:11,484 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:32:11,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:32:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:32:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-14 05:32:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 05:32:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2020-10-14 05:32:11,497 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 124 [2020-10-14 05:32:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:11,498 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2020-10-14 05:32:11,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:32:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2020-10-14 05:32:11,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:32:11,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:11,499 INFO L422 BasicCegarLoop]: trace histogram [52, 31, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:11,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:32:11,499 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -85683932, now seen corresponding path program 59 times [2020-10-14 05:32:11,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:11,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491866082] [2020-10-14 05:32:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:11,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:32:16,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:16,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:32:16,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:32:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 05:32:16,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:32:16,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:16,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:16,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:16,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:16,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:16,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2770 backedges. 1333 proven. 441 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2020-10-14 05:32:16,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491866082] [2020-10-14 05:32:16,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:16,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:32:16,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829155498] [2020-10-14 05:32:16,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:32:16,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:32:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:16,820 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand 24 states. [2020-10-14 05:32:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:16,945 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2020-10-14 05:32:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:32:16,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2020-10-14 05:32:16,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:16,947 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:32:16,947 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:32:16,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:32:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 05:32:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:32:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-14 05:32:16,957 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 126 [2020-10-14 05:32:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:16,957 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-14 05:32:16,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:32:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-14 05:32:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:32:16,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:16,958 INFO L422 BasicCegarLoop]: trace histogram [53, 31, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:16,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:32:16,958 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2142237727, now seen corresponding path program 60 times [2020-10-14 05:32:16,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:16,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781693262] [2020-10-14 05:32:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:17,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:21,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:32:21,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:32:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:22,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:22,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:22,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:22,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:22,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:22,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:22,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:32:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2875 backedges. 1376 proven. 992 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-14 05:32:22,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781693262] [2020-10-14 05:32:22,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:22,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:32:22,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212443032] [2020-10-14 05:32:22,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:32:22,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:32:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:22,580 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 34 states. [2020-10-14 05:32:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:22,721 INFO L93 Difference]: Finished difference Result 193 states and 240 transitions. [2020-10-14 05:32:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:32:22,723 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-10-14 05:32:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:22,724 INFO L225 Difference]: With dead ends: 193 [2020-10-14 05:32:22,724 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:32:22,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:32:22,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-14 05:32:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:32:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2020-10-14 05:32:22,741 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 128 [2020-10-14 05:32:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:22,741 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2020-10-14 05:32:22,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:32:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2020-10-14 05:32:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:32:22,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:22,742 INFO L422 BasicCegarLoop]: trace histogram [54, 32, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:22,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:32:22,742 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash -693000932, now seen corresponding path program 61 times [2020-10-14 05:32:22,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:22,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660121700] [2020-10-14 05:32:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:32:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:27,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 05:32:27,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:27,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:32:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-14 05:32:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:32:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:28,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:28,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:28,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:32:28,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:28,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:28,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:28,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:28,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 1440 proven. 484 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-14 05:32:28,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660121700] [2020-10-14 05:32:28,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:28,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:32:28,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141044268] [2020-10-14 05:32:28,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:32:28,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:32:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:28,089 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand 25 states. [2020-10-14 05:32:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:28,228 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2020-10-14 05:32:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:32:28,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2020-10-14 05:32:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:28,230 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:32:28,231 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:32:28,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:32:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 05:32:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 05:32:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-10-14 05:32:28,244 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 130 [2020-10-14 05:32:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:28,245 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-10-14 05:32:28,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:32:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-10-14 05:32:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:32:28,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:28,246 INFO L422 BasicCegarLoop]: trace histogram [55, 32, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:28,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:32:28,246 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1668814313, now seen corresponding path program 62 times [2020-10-14 05:32:28,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:28,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548743193] [2020-10-14 05:32:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:32:33,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:33,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:33,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:32:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:32:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:33,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3091 backedges. 1485 proven. 1056 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:33,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548743193] [2020-10-14 05:32:33,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:33,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:32:33,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123836961] [2020-10-14 05:32:33,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:32:33,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:32:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:33,884 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 35 states. [2020-10-14 05:32:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:33,999 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2020-10-14 05:32:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:32:34,000 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 132 [2020-10-14 05:32:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:34,001 INFO L225 Difference]: With dead ends: 199 [2020-10-14 05:32:34,001 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 05:32:34,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 05:32:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-14 05:32:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:32:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2020-10-14 05:32:34,016 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 132 [2020-10-14 05:32:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:34,016 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2020-10-14 05:32:34,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:32:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2020-10-14 05:32:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:32:34,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:34,017 INFO L422 BasicCegarLoop]: trace histogram [56, 33, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:34,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:32:34,018 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1226757268, now seen corresponding path program 63 times [2020-10-14 05:32:34,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:34,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871156812] [2020-10-14 05:32:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:34,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:39,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:32:39,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:39,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:39,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:39,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:39,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1530 proven. 1122 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:39,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871156812] [2020-10-14 05:32:39,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:39,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:32:39,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17157142] [2020-10-14 05:32:39,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:32:39,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:32:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:39,694 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand 36 states. [2020-10-14 05:32:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:39,837 INFO L93 Difference]: Finished difference Result 201 states and 250 transitions. [2020-10-14 05:32:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:32:39,840 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-10-14 05:32:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:39,841 INFO L225 Difference]: With dead ends: 201 [2020-10-14 05:32:39,842 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 05:32:39,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 05:32:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-14 05:32:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 05:32:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-14 05:32:39,857 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 134 [2020-10-14 05:32:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:39,857 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-14 05:32:39,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:32:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-14 05:32:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:32:39,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:39,858 INFO L422 BasicCegarLoop]: trace histogram [57, 34, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:39,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:32:39,859 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 732238801, now seen corresponding path program 64 times [2020-10-14 05:32:39,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:39,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860692854] [2020-10-14 05:32:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:44,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:44,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:32:44,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:32:44,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:45,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:45,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:45,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:45,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:45,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:45,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:45,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:45,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:45,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:45,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1598 proven. 529 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2020-10-14 05:32:45,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860692854] [2020-10-14 05:32:45,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:45,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:32:45,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139918537] [2020-10-14 05:32:45,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:32:45,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:32:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:32:45,236 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 26 states. [2020-10-14 05:32:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:45,390 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-10-14 05:32:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:32:45,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 136 [2020-10-14 05:32:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:45,397 INFO L225 Difference]: With dead ends: 157 [2020-10-14 05:32:45,398 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:32:45,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:32:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:32:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 05:32:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:32:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-10-14 05:32:45,413 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 136 [2020-10-14 05:32:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:45,413 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-10-14 05:32:45,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:32:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-10-14 05:32:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:32:45,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:45,414 INFO L422 BasicCegarLoop]: trace histogram [58, 34, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:45,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:32:45,415 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2107998324, now seen corresponding path program 65 times [2020-10-14 05:32:45,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:45,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251572706] [2020-10-14 05:32:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:45,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:45,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:50,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:32:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:51,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:51,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:51,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:51,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:51,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:51,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 1645 proven. 1190 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-14 05:32:51,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251572706] [2020-10-14 05:32:51,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:51,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:32:51,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965264483] [2020-10-14 05:32:51,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:32:51,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:51,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:32:51,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:32:51,132 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 37 states. [2020-10-14 05:32:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:51,303 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2020-10-14 05:32:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:32:51,304 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-10-14 05:32:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:51,305 INFO L225 Difference]: With dead ends: 207 [2020-10-14 05:32:51,305 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:32:51,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:32:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:32:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-14 05:32:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:32:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2020-10-14 05:32:51,320 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 138 [2020-10-14 05:32:51,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2020-10-14 05:32:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:32:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2020-10-14 05:32:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:32:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:51,322 INFO L422 BasicCegarLoop]: trace histogram [59, 35, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:51,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:32:51,322 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:51,322 INFO L82 PathProgramCache]: Analyzing trace with hash 755292233, now seen corresponding path program 66 times [2020-10-14 05:32:51,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:51,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793021474] [2020-10-14 05:32:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:51,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:51,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 05:32:56,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:32:56,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:56,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:56,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:56,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:56,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:32:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3547 backedges. 1715 proven. 576 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2020-10-14 05:32:56,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793021474] [2020-10-14 05:32:56,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:56,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:32:56,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864249036] [2020-10-14 05:32:56,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:32:56,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:32:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:32:56,720 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand 27 states. [2020-10-14 05:32:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:56,867 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2020-10-14 05:32:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:32:56,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 140 [2020-10-14 05:32:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:56,869 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:32:56,869 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:32:56,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:32:56,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:32:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 05:32:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 05:32:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2020-10-14 05:32:56,881 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 140 [2020-10-14 05:32:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:56,881 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2020-10-14 05:32:56,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:32:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2020-10-14 05:32:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:32:56,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:56,882 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:56,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:32:56,882 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:56,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:56,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1428486652, now seen corresponding path program 67 times [2020-10-14 05:32:56,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:56,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256178128] [2020-10-14 05:32:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:56,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:01,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 05:33:01,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:02,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:02,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:02,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 2340 proven. 66 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-14 05:33:02,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256178128] [2020-10-14 05:33:02,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:02,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:33:02,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147659561] [2020-10-14 05:33:02,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:33:02,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:33:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:02,332 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand 28 states. [2020-10-14 05:33:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:02,512 INFO L93 Difference]: Finished difference Result 800 states and 1152 transitions. [2020-10-14 05:33:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:33:02,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-10-14 05:33:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:02,517 INFO L225 Difference]: With dead ends: 800 [2020-10-14 05:33:02,518 INFO L226 Difference]: Without dead ends: 795 [2020-10-14 05:33:02,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-14 05:33:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 145. [2020-10-14 05:33:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 05:33:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2020-10-14 05:33:02,539 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 142 [2020-10-14 05:33:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:02,539 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2020-10-14 05:33:02,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:33:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2020-10-14 05:33:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:33:02,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:02,540 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:02,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:33:02,541 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1543896828, now seen corresponding path program 68 times [2020-10-14 05:33:02,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:02,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530738821] [2020-10-14 05:33:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:02,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:07,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:07,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:33:07,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 05:33:07,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:08,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:08,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:08,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:08,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1764 proven. 1260 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2020-10-14 05:33:08,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530738821] [2020-10-14 05:33:08,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:08,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:33:08,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677498619] [2020-10-14 05:33:08,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:33:08,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:33:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:33:08,296 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand 38 states. [2020-10-14 05:33:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:08,474 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2020-10-14 05:33:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:33:08,475 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2020-10-14 05:33:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:08,476 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:33:08,476 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 05:33:08,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:33:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 05:33:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-14 05:33:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:33:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2020-10-14 05:33:08,494 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 144 [2020-10-14 05:33:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:08,494 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2020-10-14 05:33:08,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:33:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2020-10-14 05:33:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:33:08,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:08,495 INFO L422 BasicCegarLoop]: trace histogram [61, 36, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:08,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:33:08,496 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1501304833, now seen corresponding path program 69 times [2020-10-14 05:33:08,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:08,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523351322] [2020-10-14 05:33:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:08,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:08,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:13,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:33:13,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-14 05:33:13,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:33:13,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:13,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:13,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:13,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:13,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:13,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3812 backedges. 1836 proven. 625 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2020-10-14 05:33:13,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523351322] [2020-10-14 05:33:13,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:13,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:33:13,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780624845] [2020-10-14 05:33:13,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:33:13,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:13,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:33:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:13,926 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand 28 states. [2020-10-14 05:33:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:14,093 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-10-14 05:33:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:33:14,093 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2020-10-14 05:33:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:14,095 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:33:14,095 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 05:33:14,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 05:33:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 05:33:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:33:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2020-10-14 05:33:14,113 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 146 [2020-10-14 05:33:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:14,114 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2020-10-14 05:33:14,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:33:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2020-10-14 05:33:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:33:14,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:14,115 INFO L422 BasicCegarLoop]: trace histogram [62, 36, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:14,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:33:14,115 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:14,115 INFO L82 PathProgramCache]: Analyzing trace with hash 680862972, now seen corresponding path program 70 times [2020-10-14 05:33:14,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:14,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35771061] [2020-10-14 05:33:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:14,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:19,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:19,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:33:19,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:33:19,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:19,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:19,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:33:19,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:19,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:33:19,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:19,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:19,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:19,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:19,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:19,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:19,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:19,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:19,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:19,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3935 backedges. 1887 proven. 1332 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-14 05:33:19,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35771061] [2020-10-14 05:33:19,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:19,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:33:19,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378589647] [2020-10-14 05:33:19,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:33:19,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:19,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:33:19,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:19,909 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand 39 states. [2020-10-14 05:33:20,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:20,084 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2020-10-14 05:33:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:33:20,085 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2020-10-14 05:33:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:20,086 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:33:20,086 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:33:20,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:33:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-14 05:33:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:33:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2020-10-14 05:33:20,101 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 148 [2020-10-14 05:33:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:20,101 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2020-10-14 05:33:20,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:33:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2020-10-14 05:33:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:33:20,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:20,102 INFO L422 BasicCegarLoop]: trace histogram [63, 37, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:20,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 05:33:20,103 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1861651079, now seen corresponding path program 71 times [2020-10-14 05:33:20,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:20,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780686662] [2020-10-14 05:33:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:20,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:25,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:33:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:25,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:25,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4060 backedges. 1938 proven. 1406 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-14 05:33:25,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780686662] [2020-10-14 05:33:25,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:25,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:33:25,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631273819] [2020-10-14 05:33:25,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:33:25,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:33:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:33:25,932 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand 40 states. [2020-10-14 05:33:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:26,115 INFO L93 Difference]: Finished difference Result 225 states and 280 transitions. [2020-10-14 05:33:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:33:26,116 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2020-10-14 05:33:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:26,117 INFO L225 Difference]: With dead ends: 225 [2020-10-14 05:33:26,117 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 05:33:26,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:33:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 05:33:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-14 05:33:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 05:33:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-10-14 05:33:26,132 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 150 [2020-10-14 05:33:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:26,132 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-10-14 05:33:26,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:33:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-10-14 05:33:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 05:33:26,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:26,133 INFO L422 BasicCegarLoop]: trace histogram [64, 38, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:26,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 05:33:26,133 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1381262666, now seen corresponding path program 72 times [2020-10-14 05:33:26,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:26,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397128764] [2020-10-14 05:33:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:26,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:31,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:31,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:33:31,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:31,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:31,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:31,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:31,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:31,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 2014 proven. 676 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2020-10-14 05:33:31,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397128764] [2020-10-14 05:33:31,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:31,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:33:31,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111642974] [2020-10-14 05:33:31,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:33:31,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:33:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:33:31,589 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 29 states. [2020-10-14 05:33:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:31,757 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2020-10-14 05:33:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:33:31,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2020-10-14 05:33:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:31,758 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:33:31,759 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:33:31,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:33:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:33:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 05:33:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 05:33:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2020-10-14 05:33:31,789 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 152 [2020-10-14 05:33:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:31,789 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2020-10-14 05:33:31,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:33:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2020-10-14 05:33:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 05:33:31,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:31,791 INFO L422 BasicCegarLoop]: trace histogram [65, 38, 27, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:31,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 05:33:31,792 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:31,792 INFO L82 PathProgramCache]: Analyzing trace with hash 787402353, now seen corresponding path program 73 times [2020-10-14 05:33:31,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:31,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044712129] [2020-10-14 05:33:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:31,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:31,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking...