/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:27:51,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:27:51,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:27:51,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:27:51,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:27:51,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:27:51,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:27:51,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:27:51,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:27:51,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:27:51,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:27:51,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:27:51,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:27:51,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:27:51,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:27:51,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:27:51,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:27:51,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:27:51,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:27:51,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:27:51,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:27:51,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:27:51,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:27:51,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:27:51,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:27:51,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:27:51,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:27:51,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:27:51,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:27:51,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:27:51,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:27:51,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:27:51,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:27:51,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:27:51,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:27:51,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:27:51,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:27:51,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:27:51,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:27:51,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:27:51,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:27:51,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:27:51,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:27:51,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:27:51,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:27:51,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:27:51,295 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:27:51,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:27:51,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:27:51,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:27:51,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:27:51,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:27:51,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:27:51,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:27:51,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:27:51,298 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:27:51,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:27:51,299 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:27:51,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:27:51,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:27:51,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:27:51,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:27:51,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:27:51,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:27:51,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:27:51,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:27:51,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:27:51,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:27:51,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:27:51,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:27:51,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:27:51,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:27:51,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:27:51,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:27:51,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:27:51,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:27:51,620 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:27:51,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/tcpy.c [2020-10-13 05:27:51,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcc1fa3f7/d6a1518e31c44dcbb5ec164378d1d5b9/FLAGeaac628bd [2020-10-13 05:27:52,151 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:27:52,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/tcpy.c [2020-10-13 05:27:52,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcc1fa3f7/d6a1518e31c44dcbb5ec164378d1d5b9/FLAGeaac628bd [2020-10-13 05:27:52,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fcc1fa3f7/d6a1518e31c44dcbb5ec164378d1d5b9 [2020-10-13 05:27:52,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:27:52,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:27:52,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:27:52,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:27:52,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:27:52,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbcaf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52, skipping insertion in model container [2020-10-13 05:27:52,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:27:52,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:27:52,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:27:52,754 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:27:52,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:27:52,788 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:27:52,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52 WrapperNode [2020-10-13 05:27:52,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:27:52,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:27:52,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:27:52,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:27:52,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... [2020-10-13 05:27:52,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:27:52,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:27:52,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:27:52,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:27:52,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:27:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:27:53,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:27:53,008 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:27:53,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:27:53,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:27:53,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:27:53,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:27:53,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:27:53,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:27:53,305 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 05:27:53,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:27:53 BoogieIcfgContainer [2020-10-13 05:27:53,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:27:53,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:27:53,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:27:53,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:27:53,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:27:52" (1/3) ... [2020-10-13 05:27:53,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e66e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:27:53, skipping insertion in model container [2020-10-13 05:27:53,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:27:52" (2/3) ... [2020-10-13 05:27:53,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e66e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:27:53, skipping insertion in model container [2020-10-13 05:27:53,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:27:53" (3/3) ... [2020-10-13 05:27:53,320 INFO L109 eAbstractionObserver]: Analyzing ICFG tcpy.c [2020-10-13 05:27:53,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:27:53,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:27:53,360 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:27:53,390 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:27:53,390 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:27:53,390 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:27:53,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:27:53,391 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:27:53,391 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:27:53,391 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:27:53,391 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:27:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 05:27:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:27:53,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:53,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:53,434 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash -213016898, now seen corresponding path program 1 times [2020-10-13 05:27:53,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:53,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412746083] [2020-10-13 05:27:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:54,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:27:54,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:27:54,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-13 05:27:54,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:27:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:27:54,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:54,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:54,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:54,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:27:54,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:54,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:54,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:54,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 05:27:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:54,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:54,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:54,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:54,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:54,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:54,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:27:54,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:27:54,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412746083] [2020-10-13 05:27:54,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:27:54,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:27:54,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250862690] [2020-10-13 05:27:54,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:27:54,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:27:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:27:54,595 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 05:27:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:54,716 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-13 05:27:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:27:54,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-13 05:27:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:54,727 INFO L225 Difference]: With dead ends: 59 [2020-10-13 05:27:54,727 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:27:54,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:27:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:27:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 05:27:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:27:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 05:27:54,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-13 05:27:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:54,777 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 05:27:54,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:27:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 05:27:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:27:54,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:54,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:54,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:27:54,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 488047680, now seen corresponding path program 1 times [2020-10-13 05:27:54,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:54,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799032552] [2020-10-13 05:27:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:54,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:55,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 05:27:55,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:27:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-13 05:27:55,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:27:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:55,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:55,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:55,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:55,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:55,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:27:55,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:55,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:55,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:55,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:55,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:55,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 05:27:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:55,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:55,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:55,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:27:55,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:55,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:55,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:27:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:55,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:27:55,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799032552] [2020-10-13 05:27:55,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:27:55,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:27:55,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807037114] [2020-10-13 05:27:55,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:27:55,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:27:55,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:27:55,339 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-13 05:27:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:55,473 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-13 05:27:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:27:55,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-13 05:27:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:55,475 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:27:55,476 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:27:55,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:27:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:27:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 05:27:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:27:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-13 05:27:55,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-13 05:27:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:55,497 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-13 05:27:55,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:27:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-13 05:27:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:27:55,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:55,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:55,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:27:55,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:55,502 INFO L82 PathProgramCache]: Analyzing trace with hash 685652958, now seen corresponding path program 1 times [2020-10-13 05:27:55,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:55,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308003231] [2020-10-13 05:27:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:55,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:27:56,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:27:56,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-13 05:27:56,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:27:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:56,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:27:56,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:56,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:56,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:56,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:56,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:56,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 05:27:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:56,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:56,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:27:56,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:56,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:27:56,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:56,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:27:56,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308003231] [2020-10-13 05:27:56,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:56,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:27:56,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366705235] [2020-10-13 05:27:56,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:27:56,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:27:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:27:56,192 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-13 05:27:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:56,324 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-13 05:27:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:27:56,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 05:27:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:56,325 INFO L225 Difference]: With dead ends: 52 [2020-10-13 05:27:56,325 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 05:27:56,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:27:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 05:27:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 05:27:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:27:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 05:27:56,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-10-13 05:27:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:56,334 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 05:27:56,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:27:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 05:27:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:27:56,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:56,335 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:56,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:27:56,336 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1605764092, now seen corresponding path program 2 times [2020-10-13 05:27:56,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:56,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544442181] [2020-10-13 05:27:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:56,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:27:56,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:27:56,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 05:27:56,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:27:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:27:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:27:56,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:56,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:56,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:56,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:56,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:56,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:56,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:56,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:56,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 05:27:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:56,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:56,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:56,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:56,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:56,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 05:27:56,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:27:56,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:56,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:27:56,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:27:56,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544442181] [2020-10-13 05:27:56,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:27:56,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 05:27:56,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694147161] [2020-10-13 05:27:56,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:27:56,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:27:56,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:27:56,923 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-13 05:27:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:57,341 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-13 05:27:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:27:57,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-13 05:27:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:57,345 INFO L225 Difference]: With dead ends: 50 [2020-10-13 05:27:57,346 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:27:57,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:27:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:27:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-13 05:27:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:27:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-13 05:27:57,359 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-13 05:27:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:57,359 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-13 05:27:57,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:27:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-13 05:27:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:27:57,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:57,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:57,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:27:57,361 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1096762938, now seen corresponding path program 1 times [2020-10-13 05:27:57,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:57,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302898001] [2020-10-13 05:27:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:57,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:57,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:27:57,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:27:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-10-13 05:27:57,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:27:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:27:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:27:57,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:58,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:58,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:58,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:58,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:27:58,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:58,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:58,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:58,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:27:58,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 05:27:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:58,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:58,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:58,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:58,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:58,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:27:58,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:58,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:58,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:27:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:27:58,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302898001] [2020-10-13 05:27:58,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:58,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:27:58,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097916053] [2020-10-13 05:27:58,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:27:58,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:27:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:27:58,065 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2020-10-13 05:27:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:58,485 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 05:27:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:27:58,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 05:27:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:58,489 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:27:58,489 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 05:27:58,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:27:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 05:27:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-10-13 05:27:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 05:27:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 05:27:58,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 28 [2020-10-13 05:27:58,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:58,511 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 05:27:58,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:27:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 05:27:58,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:27:58,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:58,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:58,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:27:58,513 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1572925688, now seen corresponding path program 2 times [2020-10-13 05:27:58,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:58,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045516602] [2020-10-13 05:27:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:58,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:58,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:00,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:28:00,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:28:00,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-13 05:28:00,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:00,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:28:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:28:00,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:00,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:00,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:00,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:00,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 05:28:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:00,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:00,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:00,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:00,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:28:00,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:00,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:00,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045516602] [2020-10-13 05:28:00,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:00,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:28:00,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444374688] [2020-10-13 05:28:00,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:28:00,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:28:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:28:00,280 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2020-10-13 05:28:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:00,722 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-13 05:28:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:28:00,723 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 05:28:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:00,726 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:28:00,726 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:28:00,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:28:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:28:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-10-13 05:28:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 05:28:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 05:28:00,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 30 [2020-10-13 05:28:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:00,738 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 05:28:00,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:28:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 05:28:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:28:00,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:00,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:00,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:28:00,740 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash -392320362, now seen corresponding path program 3 times [2020-10-13 05:28:00,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:00,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242359238] [2020-10-13 05:28:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:00,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:01,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:05,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:05,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:28:05,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:28:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4938 [2020-10-13 05:28:05,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:28:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 05:28:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:05,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:05,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:05,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:05,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:05,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:05,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:05,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:05,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:05,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:05,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:05,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:05,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 05:28:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:05,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:05,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:05,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:05,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:05,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:05,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:05,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:05,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:05,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:28:05,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242359238] [2020-10-13 05:28:05,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:05,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:28:05,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900909962] [2020-10-13 05:28:05,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:28:05,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:28:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:28:05,882 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 9 states. [2020-10-13 05:28:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:06,171 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-13 05:28:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:28:06,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 05:28:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:06,173 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:28:06,173 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:28:06,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:28:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:28:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-10-13 05:28:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 05:28:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 05:28:06,186 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 32 [2020-10-13 05:28:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:06,186 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 05:28:06,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:28:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 05:28:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 05:28:06,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:06,188 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:06,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:28:06,189 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash 791835828, now seen corresponding path program 4 times [2020-10-13 05:28:06,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:06,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250953207] [2020-10-13 05:28:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:06,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:06,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:06,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:06,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:28:06,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:06,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-13 05:28:06,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:28:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:28:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:07,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:07,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:07,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:07,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:07,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:28:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:07,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:07,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:07,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:28:07,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:07,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:07,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:28:07,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250953207] [2020-10-13 05:28:07,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:07,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:28:07,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122634438] [2020-10-13 05:28:07,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:28:07,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:28:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:28:07,212 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-10-13 05:28:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:07,584 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-13 05:28:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:28:07,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-13 05:28:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:07,586 INFO L225 Difference]: With dead ends: 66 [2020-10-13 05:28:07,586 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:28:07,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:28:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:28:07,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-10-13 05:28:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 05:28:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-13 05:28:07,606 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 34 [2020-10-13 05:28:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:07,607 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-13 05:28:07,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:28:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-13 05:28:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:28:07,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:07,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:07,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:28:07,612 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash 201718125, now seen corresponding path program 1 times [2020-10-13 05:28:07,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:07,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283554912] [2020-10-13 05:28:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:07,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:08,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:28:10,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:28:10,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-13 05:28:10,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:28:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:10,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:28:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:10,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:10,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 05:28:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:10,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:10,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 05:28:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:10,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:10,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:10,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:10,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:10,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:10,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:10,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:10,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:10,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:28:10,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283554912] [2020-10-13 05:28:10,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:10,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:28:10,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189084697] [2020-10-13 05:28:10,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:28:10,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:10,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:28:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:28:10,774 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2020-10-13 05:28:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:11,497 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-13 05:28:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:28:11,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-13 05:28:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:11,499 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:28:11,499 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:28:11,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:28:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:28:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-10-13 05:28:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 05:28:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-13 05:28:11,530 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 36 [2020-10-13 05:28:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:11,530 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-13 05:28:11,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:28:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-13 05:28:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:28:11,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:11,538 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:11,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:28:11,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1801981415, now seen corresponding path program 2 times [2020-10-13 05:28:11,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:11,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532614428] [2020-10-13 05:28:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:16,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:28:16,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:28:16,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4439 [2020-10-13 05:28:16,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:28:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:28:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:28:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:16,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:16,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:16,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:16,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:16,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:16,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:16,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:28:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:16,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:16,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:16,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:16,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:16,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:16,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:16,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:16,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:28:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:16,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:16,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:16,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:16,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:16,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:16,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:28:16,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532614428] [2020-10-13 05:28:16,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:16,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:28:16,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169279988] [2020-10-13 05:28:16,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:28:16,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:28:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:28:16,206 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-10-13 05:28:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:16,690 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-13 05:28:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:28:16,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-13 05:28:16,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:16,692 INFO L225 Difference]: With dead ends: 93 [2020-10-13 05:28:16,692 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:28:16,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:28:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:28:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-13 05:28:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 05:28:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-13 05:28:16,720 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 42 [2020-10-13 05:28:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:16,720 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-13 05:28:16,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:28:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-13 05:28:16,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:28:16,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:16,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:16,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:28:16,724 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash 871090592, now seen corresponding path program 3 times [2020-10-13 05:28:16,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:16,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381675544] [2020-10-13 05:28:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:16,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:17,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:19,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:28:19,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:28:19,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2683 [2020-10-13 05:28:19,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:19,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:28:19,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:28:19,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:28:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:19,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:19,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:19,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:19,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:19,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:19,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 05:28:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:19,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:19,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:19,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:28:19,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:19,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:28:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:19,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:28:19,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:19,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 05:28:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:19,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:19,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:19,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:19,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:19,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:19,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:19,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 05:28:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:19,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:19,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:19,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:19,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:19,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:19,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:19,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:19,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:28:19,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381675544] [2020-10-13 05:28:19,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:19,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:28:19,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954177325] [2020-10-13 05:28:19,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:28:19,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:19,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:28:19,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:28:19,650 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-10-13 05:28:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:20,232 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2020-10-13 05:28:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:28:20,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-13 05:28:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:20,234 INFO L225 Difference]: With dead ends: 102 [2020-10-13 05:28:20,235 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:28:20,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:28:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:28:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-13 05:28:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:28:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-13 05:28:20,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 44 [2020-10-13 05:28:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:20,248 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-13 05:28:20,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:28:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-13 05:28:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:28:20,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:20,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:20,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:28:20,249 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1021909979, now seen corresponding path program 4 times [2020-10-13 05:28:20,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:20,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438455217] [2020-10-13 05:28:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:20,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:20,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:25,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:28:25,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:28:25,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:28:25,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:25,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:28:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:25,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:28:25,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:25,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:25,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:25,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:25,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:25,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:25,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:25,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:28:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:25,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:25,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:25,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:25,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:25,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:25,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:25,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:25,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:25,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 05:28:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:25,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:25,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:25,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:25,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:25,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:25,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:28:25,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438455217] [2020-10-13 05:28:25,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:25,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:28:25,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378731250] [2020-10-13 05:28:25,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:28:25,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:25,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:28:25,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:28:25,441 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2020-10-13 05:28:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:25,845 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-13 05:28:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:28:25,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-13 05:28:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:25,847 INFO L225 Difference]: With dead ends: 124 [2020-10-13 05:28:25,847 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 05:28:25,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:28:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 05:28:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-10-13 05:28:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:28:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-10-13 05:28:25,862 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 44 [2020-10-13 05:28:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:25,863 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-10-13 05:28:25,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:28:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-10-13 05:28:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:28:25,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:25,864 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:25,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:28:25,864 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 573010243, now seen corresponding path program 5 times [2020-10-13 05:28:25,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:25,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522874360] [2020-10-13 05:28:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:25,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:25,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:26,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:29,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:30,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:30,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:28:30,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:28:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:28:30,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:28:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:30,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 05:28:30,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:31,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:31,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:31,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 05:28:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:31,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:31,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:31,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:31,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:31,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:31,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 05:28:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:31,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:31,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:31,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:31,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 05:28:31,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522874360] [2020-10-13 05:28:31,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:31,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:28:31,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293792071] [2020-10-13 05:28:31,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:28:31,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:28:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:28:31,385 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 11 states. [2020-10-13 05:28:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:32,093 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-10-13 05:28:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:28:32,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-13 05:28:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:32,095 INFO L225 Difference]: With dead ends: 146 [2020-10-13 05:28:32,095 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 05:28:32,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:28:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 05:28:32,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-13 05:28:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 05:28:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-13 05:28:32,116 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 46 [2020-10-13 05:28:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:32,117 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-13 05:28:32,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:28:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-13 05:28:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:28:32,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:32,118 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:32,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:28:32,118 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash -11981087, now seen corresponding path program 6 times [2020-10-13 05:28:32,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:32,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276855452] [2020-10-13 05:28:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:32,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:32,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:32,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:32,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:36,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:36,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:28:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:28:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4700 [2020-10-13 05:28:36,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:28:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:36,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:28:36,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:37,695 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 43 [2020-10-13 05:28:38,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:38,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:38,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:38,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:38,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 05:28:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:38,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:38,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:38,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:38,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:28:38,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:38,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:38,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:28:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:38,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:38,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:38,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:38,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:38,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:38,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:38,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:38,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:38,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:28:38,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276855452] [2020-10-13 05:28:38,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:38,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:28:38,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487101990] [2020-10-13 05:28:38,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:28:38,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:38,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:28:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:28:38,223 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 22 states. [2020-10-13 05:28:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:41,385 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2020-10-13 05:28:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:28:41,386 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 05:28:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:41,388 INFO L225 Difference]: With dead ends: 175 [2020-10-13 05:28:41,389 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:28:41,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 05:28:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:28:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 93. [2020-10-13 05:28:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 05:28:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2020-10-13 05:28:41,411 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 48 [2020-10-13 05:28:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:41,412 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2020-10-13 05:28:41,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:28:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2020-10-13 05:28:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:28:41,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:41,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:41,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:28:41,413 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 311870490, now seen corresponding path program 7 times [2020-10-13 05:28:41,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:41,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8039428] [2020-10-13 05:28:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:43,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1879 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:43,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:28:43,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:43,813 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-13 05:28:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:44,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:44,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:44,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:44,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:44,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:44,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:44,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:44,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:28:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:44,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:44,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:44,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:44,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:28:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:44,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:44,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:44,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:44,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:44,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:44,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:44,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:44,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:44,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:28:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:44,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:44,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:44,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:44,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 05:28:44,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8039428] [2020-10-13 05:28:44,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:44,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:28:44,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474293041] [2020-10-13 05:28:44,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:28:44,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:28:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:28:44,170 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 16 states. [2020-10-13 05:28:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:45,884 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-10-13 05:28:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:28:45,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-13 05:28:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:45,891 INFO L225 Difference]: With dead ends: 122 [2020-10-13 05:28:45,891 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 05:28:45,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:28:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 05:28:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2020-10-13 05:28:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 05:28:45,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2020-10-13 05:28:45,913 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 50 [2020-10-13 05:28:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:45,914 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2020-10-13 05:28:45,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:28:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2020-10-13 05:28:45,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:28:45,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:45,915 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:45,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:28:45,915 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 452066559, now seen corresponding path program 8 times [2020-10-13 05:28:45,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:45,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477298878] [2020-10-13 05:28:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:45,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:45,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:46,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:50,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:28:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:28:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:51,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:51,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:51,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:51,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:51,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:51,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:51,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:51,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 05:28:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:51,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:51,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:51,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:28:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:51,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-13 05:28:51,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477298878] [2020-10-13 05:28:51,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:51,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:28:51,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525001708] [2020-10-13 05:28:51,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:28:51,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:28:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:28:51,253 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 10 states. [2020-10-13 05:28:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:51,674 INFO L93 Difference]: Finished difference Result 172 states and 189 transitions. [2020-10-13 05:28:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:28:51,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2020-10-13 05:28:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:51,676 INFO L225 Difference]: With dead ends: 172 [2020-10-13 05:28:51,676 INFO L226 Difference]: Without dead ends: 122 [2020-10-13 05:28:51,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:28:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-13 05:28:51,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2020-10-13 05:28:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 05:28:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2020-10-13 05:28:51,697 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 50 [2020-10-13 05:28:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:51,697 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2020-10-13 05:28:51,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:28:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2020-10-13 05:28:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:28:51,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:51,698 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:51,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:28:51,699 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -274744419, now seen corresponding path program 9 times [2020-10-13 05:28:51,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:51,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614140301] [2020-10-13 05:28:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:51,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:53,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:28:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:56,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:56,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 05:28:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:56,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:28:56,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:56,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:56,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 05:28:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:56,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:56,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:28:56,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:56,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 51 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:28:56,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614140301] [2020-10-13 05:28:56,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:56,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:28:56,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411566112] [2020-10-13 05:28:56,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:28:56,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:28:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:28:56,918 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 16 states. [2020-10-13 05:28:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:58,119 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2020-10-13 05:28:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:28:58,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-13 05:28:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:58,124 INFO L225 Difference]: With dead ends: 243 [2020-10-13 05:28:58,124 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 05:28:58,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:28:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 05:28:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 114. [2020-10-13 05:28:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 05:28:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-10-13 05:28:58,146 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 52 [2020-10-13 05:28:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:58,146 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-10-13 05:28:58,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:28:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-10-13 05:28:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:28:58,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:58,147 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:58,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:28:58,148 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:58,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:58,148 INFO L82 PathProgramCache]: Analyzing trace with hash 404356187, now seen corresponding path program 10 times [2020-10-13 05:28:58,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:58,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870872928] [2020-10-13 05:28:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:58,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:03,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:29:03,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:29:03,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:29:03,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:29:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:29:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:03,954 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2020-10-13 05:29:04,145 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 42 [2020-10-13 05:29:04,607 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 64 [2020-10-13 05:29:04,799 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-13 05:29:05,444 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-13 05:29:05,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:05,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:05,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:05,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:05,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:05,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:05,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:05,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 05:29:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:05,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:05,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:05,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:05,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:05,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:29:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:05,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:05,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:05,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:05,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:05,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:05,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:05,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:29:05,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870872928] [2020-10-13 05:29:05,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:05,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:29:05,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123368563] [2020-10-13 05:29:05,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:29:05,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:29:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:29:05,843 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 26 states. [2020-10-13 05:29:06,445 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-13 05:29:06,809 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-13 05:29:07,516 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 46 [2020-10-13 05:29:07,974 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-10-13 05:29:08,277 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2020-10-13 05:29:08,612 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 56 [2020-10-13 05:29:09,233 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 43 [2020-10-13 05:29:11,227 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-13 05:29:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:11,710 INFO L93 Difference]: Finished difference Result 247 states and 276 transitions. [2020-10-13 05:29:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:29:11,711 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-13 05:29:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:11,714 INFO L225 Difference]: With dead ends: 247 [2020-10-13 05:29:11,714 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 05:29:11,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=583, Invalid=3577, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 05:29:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 05:29:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 128. [2020-10-13 05:29:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:29:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-10-13 05:29:11,761 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 54 [2020-10-13 05:29:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:11,762 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-10-13 05:29:11,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:29:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-10-13 05:29:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:29:11,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:11,763 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:11,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:29:11,763 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1909699820, now seen corresponding path program 11 times [2020-10-13 05:29:11,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:11,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178630595] [2020-10-13 05:29:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:11,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:12,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:29:16,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:29:16,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:29:16,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:17,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:17,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:17,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:17,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:17,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:17,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 05:29:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:17,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:17,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:17,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:17,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:17,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:17,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:29:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:17,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:17,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:17,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:17,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:17,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:17,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:29:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:17,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:17,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:17,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:17,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:17,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:17,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:17,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:17,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 05:29:17,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178630595] [2020-10-13 05:29:17,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:17,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:29:17,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758696881] [2020-10-13 05:29:17,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:29:17,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:17,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:29:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:29:17,126 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand 13 states. [2020-10-13 05:29:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:18,028 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-10-13 05:29:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:29:18,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 05:29:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:18,031 INFO L225 Difference]: With dead ends: 162 [2020-10-13 05:29:18,031 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 05:29:18,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:29:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 05:29:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2020-10-13 05:29:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 05:29:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 05:29:18,059 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 56 [2020-10-13 05:29:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:18,060 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 05:29:18,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:29:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 05:29:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:29:18,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:18,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:18,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:29:18,061 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash -598632627, now seen corresponding path program 12 times [2020-10-13 05:29:18,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:18,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035678739] [2020-10-13 05:29:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:18,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:19,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1502 [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:29:19,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 05:29:19,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:19,890 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2020-10-13 05:29:20,126 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-13 05:29:20,300 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-10-13 05:29:20,465 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 05:29:21,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:21,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:21,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:29:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:21,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:21,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:21,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:21,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:29:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:21,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:21,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:29:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:29:21,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:29:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:21,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:29:21,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:21,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:21,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 05:29:21,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035678739] [2020-10-13 05:29:21,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:21,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:29:21,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536532211] [2020-10-13 05:29:21,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:29:21,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:29:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:29:21,156 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 17 states. [2020-10-13 05:29:21,681 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-13 05:29:21,873 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-13 05:29:22,531 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-10-13 05:29:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:23,346 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-10-13 05:29:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:29:23,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-13 05:29:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:23,349 INFO L225 Difference]: With dead ends: 152 [2020-10-13 05:29:23,349 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 05:29:23,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:29:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 05:29:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2020-10-13 05:29:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 05:29:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2020-10-13 05:29:23,403 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 58 [2020-10-13 05:29:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:23,403 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2020-10-13 05:29:23,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:29:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2020-10-13 05:29:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:29:23,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:23,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:23,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:29:23,405 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash -437113646, now seen corresponding path program 13 times [2020-10-13 05:29:23,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:23,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775730195] [2020-10-13 05:29:23,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:23,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:23,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:28,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:29:28,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:28,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:28,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:28,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:28,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:28,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:28,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:28,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 05:29:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:28,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:28,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:28,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:28,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:28,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:28,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:29:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:28,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:28,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:28,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:28,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:28,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:28,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:29:28,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:28,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:29:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:28,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:28,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:28,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:28,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 05:29:28,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775730195] [2020-10-13 05:29:28,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:28,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:29:28,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688258513] [2020-10-13 05:29:28,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:29:28,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:29:28,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:29:28,650 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand 15 states. [2020-10-13 05:29:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:29,299 INFO L93 Difference]: Finished difference Result 200 states and 213 transitions. [2020-10-13 05:29:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:29:29,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-13 05:29:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:29,301 INFO L225 Difference]: With dead ends: 200 [2020-10-13 05:29:29,301 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 05:29:29,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:29:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 05:29:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2020-10-13 05:29:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 05:29:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-10-13 05:29:29,328 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 58 [2020-10-13 05:29:29,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:29,328 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-10-13 05:29:29,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:29:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-10-13 05:29:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:29:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:29,329 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:29,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:29:29,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1318384617, now seen corresponding path program 14 times [2020-10-13 05:29:29,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:29,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262248553] [2020-10-13 05:29:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:29,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:29,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:30,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:33,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:34,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:29:34,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:29:34,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:34,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:34,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:34,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:34,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:34,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:34,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:34,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 05:29:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:34,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:34,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:34,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:29:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:34,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:34,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:34,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:34,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:29:34,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:34,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:29:34,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262248553] [2020-10-13 05:29:34,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:34,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:29:34,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987799250] [2020-10-13 05:29:34,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:29:34,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:29:34,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:29:34,787 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 19 states. [2020-10-13 05:29:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:36,694 INFO L93 Difference]: Finished difference Result 254 states and 280 transitions. [2020-10-13 05:29:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:29:36,697 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 58 [2020-10-13 05:29:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:36,699 INFO L225 Difference]: With dead ends: 254 [2020-10-13 05:29:36,699 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 05:29:36,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:29:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 05:29:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 142. [2020-10-13 05:29:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 05:29:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2020-10-13 05:29:36,734 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 58 [2020-10-13 05:29:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:36,734 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2020-10-13 05:29:36,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:29:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2020-10-13 05:29:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:29:36,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:36,736 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:36,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:29:36,736 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1806494123, now seen corresponding path program 15 times [2020-10-13 05:29:36,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:36,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461508900] [2020-10-13 05:29:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:41,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:29:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:29:41,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:42,862 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 05:29:43,083 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-10-13 05:29:43,428 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 54 [2020-10-13 05:29:43,996 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2020-10-13 05:29:44,237 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 05:29:44,565 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 05:29:45,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:45,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:45,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:45,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:45,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:45,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:45,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:45,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:45,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:45,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 05:29:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:45,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:45,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:45,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 05:29:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:45,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:45,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:45,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:45,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:45,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:45,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:45,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:45,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:45,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 5 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:29:45,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461508900] [2020-10-13 05:29:45,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:45,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:29:45,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738383262] [2020-10-13 05:29:45,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:29:45,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:29:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:29:45,098 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand 29 states. [2020-10-13 05:29:45,637 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-13 05:29:46,132 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-13 05:29:46,753 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-13 05:29:47,799 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-10-13 05:29:48,277 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-13 05:29:49,348 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-13 05:29:50,536 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2020-10-13 05:29:51,041 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 69 [2020-10-13 05:29:51,378 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-13 05:29:51,755 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 71 [2020-10-13 05:29:52,272 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 77 [2020-10-13 05:29:52,801 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 79 [2020-10-13 05:29:53,254 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 69 [2020-10-13 05:29:53,696 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 71 [2020-10-13 05:29:54,200 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2020-10-13 05:29:57,245 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 42 [2020-10-13 05:29:57,996 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2020-10-13 05:29:59,333 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-13 05:29:59,743 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-13 05:30:00,023 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-13 05:30:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:00,368 INFO L93 Difference]: Finished difference Result 287 states and 323 transitions. [2020-10-13 05:30:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 05:30:00,369 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-10-13 05:30:00,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:00,372 INFO L225 Difference]: With dead ends: 287 [2020-10-13 05:30:00,372 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 05:30:00,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=716, Invalid=6594, Unknown=0, NotChecked=0, Total=7310 [2020-10-13 05:30:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 05:30:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 173. [2020-10-13 05:30:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-13 05:30:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2020-10-13 05:30:00,431 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 60 [2020-10-13 05:30:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:00,431 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2020-10-13 05:30:00,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:30:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2020-10-13 05:30:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:30:00,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:00,433 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:00,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:30:00,433 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1283260046, now seen corresponding path program 16 times [2020-10-13 05:30:00,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:00,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396835090] [2020-10-13 05:30:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:05,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:05,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:30:05,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:30:05,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:30:05,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:05,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:30:05,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:30:05,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 05:30:05,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:06,658 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-10-13 05:30:06,922 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-13 05:30:07,177 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 61 [2020-10-13 05:30:07,438 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 37 [2020-10-13 05:30:07,779 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 33 [2020-10-13 05:30:07,992 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 33 [2020-10-13 05:30:08,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:08,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:08,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:08,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:08,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 05:30:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:08,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:08,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:08,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:08,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:30:08,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:08,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:08,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:08,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:30:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:08,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:08,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:08,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:08,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:30:08,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:08,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:30:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:08,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:08,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:08,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:08,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:08,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:08,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 84 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:30:08,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396835090] [2020-10-13 05:30:08,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:08,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:30:08,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810316011] [2020-10-13 05:30:08,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:30:08,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:08,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:30:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:30:08,487 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand 27 states. [2020-10-13 05:30:09,476 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 30 [2020-10-13 05:30:09,962 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-13 05:30:10,207 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-13 05:30:10,568 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 05:30:10,734 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 35 [2020-10-13 05:30:11,209 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-13 05:30:11,522 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-13 05:30:11,845 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-13 05:30:12,148 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-10-13 05:30:12,532 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-13 05:30:12,777 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-13 05:30:13,062 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-13 05:30:13,410 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-13 05:30:13,840 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-13 05:30:14,070 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-13 05:30:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:15,616 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2020-10-13 05:30:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 05:30:15,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-13 05:30:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:15,619 INFO L225 Difference]: With dead ends: 216 [2020-10-13 05:30:15,620 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 05:30:15,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=815, Invalid=3475, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 05:30:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 05:30:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2020-10-13 05:30:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 05:30:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2020-10-13 05:30:15,670 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 62 [2020-10-13 05:30:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:15,671 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2020-10-13 05:30:15,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:30:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2020-10-13 05:30:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:30:15,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:15,674 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:15,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:30:15,674 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:15,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1881832377, now seen corresponding path program 17 times [2020-10-13 05:30:15,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:15,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233383008] [2020-10-13 05:30:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:15,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:15,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:15,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:16,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:17,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:17,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:20,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:30:20,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 05:30:20,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,258 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 33 [2020-10-13 05:30:21,407 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-13 05:30:21,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:21,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:21,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 05:30:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:21,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:21,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:21,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:21,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 05:30:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:21,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:21,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:21,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:21,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:21,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:30:21,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:21,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:21,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:30:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:21,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:21,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:21,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:21,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 05:30:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:21,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:21,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:21,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 05:30:21,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233383008] [2020-10-13 05:30:21,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:21,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:30:21,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318098488] [2020-10-13 05:30:21,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:30:21,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:30:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:30:21,815 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand 20 states. [2020-10-13 05:30:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:24,168 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2020-10-13 05:30:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:30:24,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-10-13 05:30:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:24,172 INFO L225 Difference]: With dead ends: 217 [2020-10-13 05:30:24,172 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 05:30:24,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:30:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 05:30:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 189. [2020-10-13 05:30:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-13 05:30:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 201 transitions. [2020-10-13 05:30:24,229 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 201 transitions. Word has length 64 [2020-10-13 05:30:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:24,229 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 201 transitions. [2020-10-13 05:30:24,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:30:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 201 transitions. [2020-10-13 05:30:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:30:24,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:24,230 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:24,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:30:24,231 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1026262912, now seen corresponding path program 18 times [2020-10-13 05:30:24,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:24,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257388649] [2020-10-13 05:30:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:24,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:24,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:25,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2786 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 05:30:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:27,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 05:30:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:30:27,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:30:27,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 05:30:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:27,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:27,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:30:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:30:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:27,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:27,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:30:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:27,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:27,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:27,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:27,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:27,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:27,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 05:30:27,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257388649] [2020-10-13 05:30:27,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:27,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:30:27,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644323649] [2020-10-13 05:30:27,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:30:27,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:30:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:30:27,388 INFO L87 Difference]: Start difference. First operand 189 states and 201 transitions. Second operand 15 states. [2020-10-13 05:30:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:28,131 INFO L93 Difference]: Finished difference Result 234 states and 246 transitions. [2020-10-13 05:30:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:30:28,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-13 05:30:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:28,134 INFO L225 Difference]: With dead ends: 234 [2020-10-13 05:30:28,134 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 05:30:28,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:30:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 05:30:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2020-10-13 05:30:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 05:30:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 172 transitions. [2020-10-13 05:30:28,168 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 172 transitions. Word has length 66 [2020-10-13 05:30:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:28,169 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 172 transitions. [2020-10-13 05:30:28,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:30:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 172 transitions. [2020-10-13 05:30:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:30:28,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:28,170 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:28,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:30:28,170 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2089785071, now seen corresponding path program 19 times [2020-10-13 05:30:28,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:28,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855907265] [2020-10-13 05:30:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:28,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:28,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:29,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:29,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:29,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:29,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:30,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:30,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:30,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:30:33,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:30:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:33,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:33,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:33,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:33,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 05:30:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:33,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:33,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:30:33,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:33,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:33,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 05:30:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:33,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:33,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:33,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:33,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:33,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:30:33,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:33,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:33,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:30:33,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:33,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:30:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:30:33,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855907265] [2020-10-13 05:30:33,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:33,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:30:33,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238968740] [2020-10-13 05:30:33,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:30:33,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:30:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:30:33,609 INFO L87 Difference]: Start difference. First operand 164 states and 172 transitions. Second operand 22 states. [2020-10-13 05:30:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:36,444 INFO L93 Difference]: Finished difference Result 300 states and 331 transitions. [2020-10-13 05:30:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 05:30:36,445 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2020-10-13 05:30:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:36,447 INFO L225 Difference]: With dead ends: 300 [2020-10-13 05:30:36,447 INFO L226 Difference]: Without dead ends: 283 [2020-10-13 05:30:36,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=1628, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:30:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-13 05:30:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 168. [2020-10-13 05:30:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 05:30:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-10-13 05:30:36,498 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 64 [2020-10-13 05:30:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:36,499 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-10-13 05:30:36,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:30:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-10-13 05:30:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:30:36,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:36,500 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:36,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:30:36,501 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -92988209, now seen corresponding path program 20 times [2020-10-13 05:30:36,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:36,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070891050] [2020-10-13 05:30:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:38,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:38,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:41,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:30:41,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 05:30:41,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:42,991 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 47 [2020-10-13 05:30:43,347 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2020-10-13 05:30:43,642 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 25 [2020-10-13 05:30:44,016 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 52 [2020-10-13 05:30:44,493 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 64 [2020-10-13 05:30:44,958 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 52 [2020-10-13 05:30:45,518 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 62 [2020-10-13 05:30:46,232 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 61 [2020-10-13 05:30:46,919 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 75 [2020-10-13 05:30:47,186 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 05:30:47,432 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2020-10-13 05:30:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:47,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:48,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 05:30:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:48,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:30:48,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:48,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 05:30:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:48,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:48,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:30:48,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:30:48,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070891050] [2020-10-13 05:30:48,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:48,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:30:48,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069701519] [2020-10-13 05:30:48,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:30:48,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:48,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:30:48,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:30:48,043 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 32 states. [2020-10-13 05:30:49,170 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 86 [2020-10-13 05:30:50,031 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 89 [2020-10-13 05:30:51,035 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 87 [2020-10-13 05:30:52,874 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 102 [2020-10-13 05:30:53,511 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 55 [2020-10-13 05:30:53,799 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2020-10-13 05:30:54,240 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-10-13 05:30:54,622 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 42 [2020-10-13 05:30:54,882 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 26 [2020-10-13 05:30:55,338 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 55 [2020-10-13 05:30:55,600 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 36 [2020-10-13 05:30:56,029 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 27 [2020-10-13 05:30:56,349 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2020-10-13 05:30:56,573 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 39 [2020-10-13 05:30:56,865 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 35 [2020-10-13 05:30:57,090 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-10-13 05:30:57,403 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 49 [2020-10-13 05:30:57,743 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 41 [2020-10-13 05:30:58,232 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 43 [2020-10-13 05:30:58,534 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2020-10-13 05:30:59,047 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 55 [2020-10-13 05:30:59,386 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 42 [2020-10-13 05:30:59,749 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2020-10-13 05:31:00,075 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 39 [2020-10-13 05:31:00,459 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 45 [2020-10-13 05:31:00,841 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 40 [2020-10-13 05:31:01,368 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 51 [2020-10-13 05:31:01,637 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 40 [2020-10-13 05:31:01,955 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 42 [2020-10-13 05:31:02,369 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 35 [2020-10-13 05:31:02,873 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2020-10-13 05:31:03,320 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 39 [2020-10-13 05:31:05,400 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2020-10-13 05:31:05,853 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 34 [2020-10-13 05:31:06,284 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 40 [2020-10-13 05:31:06,971 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 42 [2020-10-13 05:31:07,194 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 28 [2020-10-13 05:31:07,505 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 37 [2020-10-13 05:31:07,945 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 38 [2020-10-13 05:31:08,594 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 31 [2020-10-13 05:31:09,691 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 60 [2020-10-13 05:31:10,158 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 36 [2020-10-13 05:31:10,732 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 35 [2020-10-13 05:31:11,083 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-10-13 05:31:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:31:11,208 INFO L93 Difference]: Finished difference Result 320 states and 356 transitions. [2020-10-13 05:31:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-13 05:31:11,210 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-10-13 05:31:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:31:11,213 INFO L225 Difference]: With dead ends: 320 [2020-10-13 05:31:11,213 INFO L226 Difference]: Without dead ends: 301 [2020-10-13 05:31:11,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=983, Invalid=8523, Unknown=0, NotChecked=0, Total=9506 [2020-10-13 05:31:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-13 05:31:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 199. [2020-10-13 05:31:11,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 05:31:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 208 transitions. [2020-10-13 05:31:11,287 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 208 transitions. Word has length 66 [2020-10-13 05:31:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:31:11,287 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 208 transitions. [2020-10-13 05:31:11,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:31:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 208 transitions. [2020-10-13 05:31:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:31:11,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:31:11,289 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:31:11,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:31:11,289 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:31:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:31:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash -111051128, now seen corresponding path program 21 times [2020-10-13 05:31:11,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:31:11,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035301217] [2020-10-13 05:31:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:31:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:11,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:16,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:31:16,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:31:16,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 05:31:16,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:16,502 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-10-13 05:31:16,617 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-10-13 05:31:16,788 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-13 05:31:16,945 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-10-13 05:31:17,083 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-13 05:31:17,232 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 05:31:18,450 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 05:31:18,752 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 05:31:19,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:31:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:19,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:19,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:19,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:31:19,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:31:19,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:19,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 05:31:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:19,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:19,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:19,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:19,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:19,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 05:31:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:19,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:19,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-13 05:31:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:19,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:19,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:19,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 6 proven. 127 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:31:19,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035301217] [2020-10-13 05:31:19,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:31:19,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:31:19,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203561020] [2020-10-13 05:31:19,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:31:19,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:31:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:31:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:31:19,825 INFO L87 Difference]: Start difference. First operand 199 states and 208 transitions. Second operand 28 states. [2020-10-13 05:31:21,727 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-13 05:31:22,989 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-10-13 05:31:23,405 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 48 [2020-10-13 05:31:23,853 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2020-10-13 05:31:24,379 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-13 05:31:24,802 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 56 [2020-10-13 05:31:25,145 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 59 [2020-10-13 05:31:25,477 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2020-10-13 05:31:25,883 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 59 [2020-10-13 05:31:26,226 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-13 05:31:30,195 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-10-13 05:31:31,236 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2020-10-13 05:31:31,900 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-10-13 05:31:32,369 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 05:31:32,728 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-13 05:31:33,021 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-13 05:31:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:31:33,462 INFO L93 Difference]: Finished difference Result 291 states and 320 transitions. [2020-10-13 05:31:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 05:31:33,464 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-10-13 05:31:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:31:33,466 INFO L225 Difference]: With dead ends: 291 [2020-10-13 05:31:33,466 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 05:31:33,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=494, Invalid=3796, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 05:31:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 05:31:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 199. [2020-10-13 05:31:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 05:31:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 208 transitions. [2020-10-13 05:31:33,510 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 208 transitions. Word has length 68 [2020-10-13 05:31:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:31:33,511 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 208 transitions. [2020-10-13 05:31:33,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:31:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 208 transitions. [2020-10-13 05:31:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 05:31:33,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:31:33,512 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:31:33,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:31:33,512 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:31:33,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:31:33,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2141184575, now seen corresponding path program 22 times [2020-10-13 05:31:33,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:31:33,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495356686] [2020-10-13 05:31:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:31:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:33,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:34,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:35,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:35,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:31:38,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:31:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:31:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:38,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:31:38,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 05:31:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:38,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:31:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:38,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:31:38,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 05:31:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:38,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:38,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:38,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-13 05:31:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:38,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 05:31:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:31:38,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:31:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:31:38,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:31:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-13 05:31:38,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495356686] [2020-10-13 05:31:38,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:31:38,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:31:38,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766648489] [2020-10-13 05:31:38,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:31:38,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:31:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:31:38,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:31:38,951 INFO L87 Difference]: Start difference. First operand 199 states and 208 transitions. Second operand 15 states. [2020-10-13 05:31:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:31:40,421 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-10-13 05:31:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:31:40,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-13 05:31:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:31:40,428 INFO L225 Difference]: With dead ends: 239 [2020-10-13 05:31:40,428 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 05:31:40,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:31:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 05:31:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 201. [2020-10-13 05:31:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-13 05:31:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 210 transitions. [2020-10-13 05:31:40,485 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 210 transitions. Word has length 70 [2020-10-13 05:31:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:31:40,485 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 210 transitions. [2020-10-13 05:31:40,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:31:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 210 transitions. [2020-10-13 05:31:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:31:40,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:31:40,503 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:31:40,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:31:40,503 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:31:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:31:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1630020998, now seen corresponding path program 23 times [2020-10-13 05:31:40,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:31:40,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857979277] [2020-10-13 05:31:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:31:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:31:40,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:40,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:40,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:41,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:31:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking...