/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:00:13,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:00:13,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:00:13,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:00:13,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:00:13,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:00:13,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:00:13,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:00:13,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:00:13,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:00:13,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:00:13,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:00:13,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:00:13,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:00:13,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:00:13,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:00:13,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:00:13,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:00:13,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:00:13,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:00:13,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:00:13,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:00:13,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:00:13,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:00:13,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:00:13,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:00:13,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:00:13,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:00:13,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:00:13,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:00:13,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:00:13,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:00:13,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:00:13,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:00:13,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:00:13,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:00:13,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:00:13,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:00:13,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:00:13,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:00:13,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:00:13,277 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 [2020-09-25 08:00:13,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:00:13,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:00:13,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:00:13,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:00:13,313 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:00:13,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:00:13,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:00:13,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:00:13,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:00:13,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:00:13,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:00:13,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:00:13,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:00:13,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:00:13,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:00:13,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:00:13,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:00:13,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:00:13,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:00:13,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:00:13,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:00:13,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:00:13,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:00:13,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:00:13,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:00:13,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:00:13,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:00:13,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:00:13,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:00:13,319 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:00:13,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:00:13,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:00:13,871 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:00:13,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:00:13,873 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:00:13,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 08:00:13,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7061431/920954abe9be4da6a994c1c8daa2af18/FLAG936e0c043 [2020-09-25 08:00:14,519 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:00:14,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 08:00:14,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7061431/920954abe9be4da6a994c1c8daa2af18/FLAG936e0c043 [2020-09-25 08:00:14,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ad7061431/920954abe9be4da6a994c1c8daa2af18 [2020-09-25 08:00:14,864 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:00:14,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:00:14,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:00:14,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:00:14,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:00:14,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:14" (1/1) ... [2020-09-25 08:00:14,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1573d552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:14, skipping insertion in model container [2020-09-25 08:00:14,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:00:14" (1/1) ... [2020-09-25 08:00:14,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:00:14,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:00:15,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:00:15,174 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:00:15,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:00:15,211 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:00:15,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15 WrapperNode [2020-09-25 08:00:15,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:00:15,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:00:15,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:00:15,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:00:15,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (1/1) ... [2020-09-25 08:00:15,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:00:15,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:00:15,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:00:15,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:00:15,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (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 [2020-09-25 08:00:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:00:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:00:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:00:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 08:00:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:00:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:00:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 08:00:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:00:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 08:00:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 08:00:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:00:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:00:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:00:15,841 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:00:15,841 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 08:00:15,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:15 BoogieIcfgContainer [2020-09-25 08:00:15,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:00:15,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:00:15,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:00:15,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:00:15,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:00:14" (1/3) ... [2020-09-25 08:00:15,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd9b724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:15, skipping insertion in model container [2020-09-25 08:00:15,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:00:15" (2/3) ... [2020-09-25 08:00:15,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd9b724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:00:15, skipping insertion in model container [2020-09-25 08:00:15,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:00:15" (3/3) ... [2020-09-25 08:00:15,857 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 08:00:15,869 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:00:15,879 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:00:15,902 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:00:15,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:00:15,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:00:15,931 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:00:15,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:00:15,931 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:00:15,931 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:00:15,931 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:00:15,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:00:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 08:00:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 08:00:15,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:15,963 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, 1, 1, 1, 1, 1] [2020-09-25 08:00:15,964 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 08:00:15,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:15,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473784642] [2020-09-25 08:00:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:16,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:16,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:00:16,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:16,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-09-25 08:00:16,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:16,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 08:00:16,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:16,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 08:00:16,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:16,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:16,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:16,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:16,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:16,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:16,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:16,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:16,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:16,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:00:16,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:16,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:00:16,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:16,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:16,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 08:00:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:16,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473784642] [2020-09-25 08:00:16,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:16,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:00:16,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684803411] [2020-09-25 08:00:16,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:00:16,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:00:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:00:16,628 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 08:00:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:16,853 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 08:00:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:00:16,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 08:00:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:16,870 INFO L225 Difference]: With dead ends: 94 [2020-09-25 08:00:16,870 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 08:00:16,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:00:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 08:00:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 08:00:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 08:00:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 08:00:16,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 08:00:16,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:16,943 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 08:00:16,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:00:16,944 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 08:00:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 08:00:16,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:16,946 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, 1, 1, 1, 1, 1] [2020-09-25 08:00:16,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:00:16,947 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:16,947 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-25 08:00:16,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:16,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947865094] [2020-09-25 08:00:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:16,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:17,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 08:00:17,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:17,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-09-25 08:00:17,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:17,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:00:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:00:17,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 08:00:17,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:17,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:17,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:17,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:17,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:17,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:17,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:17,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:17,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:17,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:17,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:17,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:17,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:00:17,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:17,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 08:00:17,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:17,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:17,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:17,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:17,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:17,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:17,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947865094] [2020-09-25 08:00:17,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:17,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:00:17,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989998324] [2020-09-25 08:00:17,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:00:17,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:00:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:00:17,486 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-25 08:00:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:17,672 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-25 08:00:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:00:17,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 08:00:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:17,676 INFO L225 Difference]: With dead ends: 83 [2020-09-25 08:00:17,676 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 08:00:17,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:00:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 08:00:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 08:00:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 08:00:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 08:00:17,694 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 08:00:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:17,694 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 08:00:17,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:00:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 08:00:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 08:00:17,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:17,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:17,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:00:17,697 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 08:00:17,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:17,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117750132] [2020-09-25 08:00:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:17,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:17,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:18,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:19,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 08:00:19,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:00:19,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1695 [2020-09-25 08:00:19,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:19,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:19,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:00:19,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:00:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 08:00:19,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:19,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:19,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:19,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:19,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:19,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:19,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:19,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:19,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:19,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:19,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:19,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:19,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:19,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:00:19,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:19,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 08:00:19,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:19,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:19,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117750132] [2020-09-25 08:00:19,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:19,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 08:00:19,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914907715] [2020-09-25 08:00:19,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:00:19,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:00:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:00:19,549 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-25 08:00:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:19,828 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-25 08:00:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 08:00:19,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-25 08:00:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:19,830 INFO L225 Difference]: With dead ends: 92 [2020-09-25 08:00:19,830 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 08:00:19,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:00:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 08:00:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-25 08:00:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 08:00:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-09-25 08:00:19,854 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2020-09-25 08:00:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:19,855 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-09-25 08:00:19,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:00:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-09-25 08:00:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 08:00:19,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:19,861 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:19,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:00:19,861 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:19,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1465690975, now seen corresponding path program 2 times [2020-09-25 08:00:19,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:19,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268731730] [2020-09-25 08:00:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:19,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:19,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:20,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:22,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 08:00:22,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:00:22,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2276 [2020-09-25 08:00:22,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:22,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:22,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:00:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:00:22,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 08:00:22,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:22,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:22,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:22,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:22,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:22,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:22,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:22,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:22,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:22,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:22,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:22,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:22,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:22,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:22,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:00:22,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:22,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 08:00:22,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:22,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:22,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:22,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:22,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:00:22,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268731730] [2020-09-25 08:00:22,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:22,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 08:00:22,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781938657] [2020-09-25 08:00:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 08:00:22,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 08:00:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 08:00:22,289 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 9 states. [2020-09-25 08:00:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:22,513 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-09-25 08:00:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 08:00:22,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 08:00:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:22,516 INFO L225 Difference]: With dead ends: 101 [2020-09-25 08:00:22,516 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 08:00:22,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-25 08:00:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 08:00:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2020-09-25 08:00:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 08:00:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-09-25 08:00:22,526 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 43 [2020-09-25 08:00:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:22,527 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-09-25 08:00:22,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 08:00:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-09-25 08:00:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 08:00:22,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:22,529 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:22,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:00:22,530 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:22,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1794777616, now seen corresponding path program 3 times [2020-09-25 08:00:22,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:22,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884881241] [2020-09-25 08:00:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:22,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:25,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 08:00:25,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:00:25,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-09-25 08:00:25,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:25,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:25,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:00:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:00:25,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 08:00:25,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:25,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:25,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:25,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:25,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:00:25,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:25,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:25,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:25,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:25,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:26,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:26,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 08:00:26,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 08:00:26,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:26,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:00:26,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 08:00:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 08:00:26,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 08:00:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 08:00:26,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884881241] [2020-09-25 08:00:26,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:26,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 08:00:26,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548899811] [2020-09-25 08:00:26,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 08:00:26,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:26,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 08:00:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 08:00:26,051 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 7 states. [2020-09-25 08:00:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:26,304 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-09-25 08:00:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 08:00:26,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-09-25 08:00:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:26,308 INFO L225 Difference]: With dead ends: 119 [2020-09-25 08:00:26,308 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 08:00:26,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 08:00:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 08:00:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-09-25 08:00:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 08:00:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-09-25 08:00:26,328 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 50 [2020-09-25 08:00:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:26,328 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-09-25 08:00:26,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 08:00:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-09-25 08:00:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 08:00:26,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:26,330 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:26,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:00:26,333 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:26,334 INFO L82 PathProgramCache]: Analyzing trace with hash 938976628, now seen corresponding path program 1 times [2020-09-25 08:00:26,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:26,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576652515] [2020-09-25 08:00:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:26,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:27,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:28,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:31,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 08:00:31,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 08:00:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 08:00:31,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:31,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:00:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 08:00:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 08:00:31,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:31,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:31,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:31,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:31,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:31,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:31,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:31,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:31,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:31,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:31,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:00:31,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:31,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 08:00:31,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:31,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:31,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:31,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576652515] [2020-09-25 08:00:31,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:31,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:00:31,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929323056] [2020-09-25 08:00:31,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:00:31,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:00:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:00:31,640 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 11 states. [2020-09-25 08:00:32,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:32,009 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-09-25 08:00:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 08:00:32,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-09-25 08:00:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:32,011 INFO L225 Difference]: With dead ends: 108 [2020-09-25 08:00:32,012 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 08:00:32,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-25 08:00:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 08:00:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-09-25 08:00:32,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 08:00:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-09-25 08:00:32,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 56 [2020-09-25 08:00:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:32,034 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-09-25 08:00:32,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:00:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-09-25 08:00:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 08:00:32,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:32,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:32,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:00:32,038 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash -607155779, now seen corresponding path program 2 times [2020-09-25 08:00:32,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:32,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143872988] [2020-09-25 08:00:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:32,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:32,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:32,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:33,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:34,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:34,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:36,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:37,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 08:00:37,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:00:37,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 08:00:37,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:37,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 08:00:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 08:00:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 08:00:37,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:37,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:37,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:37,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:37,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:00:37,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:37,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:37,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:37,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:37,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:37,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:37,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:00:37,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:37,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 08:00:37,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:37,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:37,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:37,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:37,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:00:37,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143872988] [2020-09-25 08:00:37,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:37,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 08:00:37,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042301657] [2020-09-25 08:00:37,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 08:00:37,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:37,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 08:00:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 08:00:37,297 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 13 states. [2020-09-25 08:00:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:37,592 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2020-09-25 08:00:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 08:00:37,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-09-25 08:00:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:37,594 INFO L225 Difference]: With dead ends: 117 [2020-09-25 08:00:37,594 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 08:00:37,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-09-25 08:00:37,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 08:00:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-25 08:00:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 08:00:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2020-09-25 08:00:37,602 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 63 [2020-09-25 08:00:37,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:37,603 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2020-09-25 08:00:37,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 08:00:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2020-09-25 08:00:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 08:00:37,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:37,605 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:37,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:00:37,605 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1287327404, now seen corresponding path program 3 times [2020-09-25 08:00:37,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:37,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189671174] [2020-09-25 08:00:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:37,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:37,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:39,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:39,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:40,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:42,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 08:00:42,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:00:42,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:00:42,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:42,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:42,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:00:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 08:00:42,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 08:00:42,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:42,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:42,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:42,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:42,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:00:42,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:42,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:42,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:42,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:00:42,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:42,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 08:00:42,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:42,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 08:00:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:42,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 08:00:42,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-09-25 08:00:43,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189671174] [2020-09-25 08:00:43,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:43,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 08:00:43,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750058749] [2020-09-25 08:00:43,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 08:00:43,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 08:00:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 08:00:43,041 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand 11 states. [2020-09-25 08:00:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:43,377 INFO L93 Difference]: Finished difference Result 215 states and 240 transitions. [2020-09-25 08:00:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 08:00:43,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-09-25 08:00:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:43,379 INFO L225 Difference]: With dead ends: 215 [2020-09-25 08:00:43,379 INFO L226 Difference]: Without dead ends: 159 [2020-09-25 08:00:43,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:00:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-25 08:00:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2020-09-25 08:00:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-25 08:00:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-09-25 08:00:43,401 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 70 [2020-09-25 08:00:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:43,401 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-09-25 08:00:43,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 08:00:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-09-25 08:00:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 08:00:43,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:43,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:43,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 08:00:43,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash 724610805, now seen corresponding path program 1 times [2020-09-25 08:00:43,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:43,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895332474] [2020-09-25 08:00:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:43,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:44,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:45,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:45,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 08:00:48,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 08:00:48,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:00:48,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:00:48,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 08:00:48,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 08:00:48,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:48,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:48,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:00:48,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:48,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:48,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:48,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 08:00:48,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:48,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-25 08:00:48,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:48,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:48,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:48,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:48,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-09-25 08:00:48,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895332474] [2020-09-25 08:00:48,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:00:48,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:00:48,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001610449] [2020-09-25 08:00:48,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:00:48,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:00:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:00:48,610 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 5 states. [2020-09-25 08:00:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:48,727 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-25 08:00:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:00:48,728 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-09-25 08:00:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:48,729 INFO L225 Difference]: With dead ends: 159 [2020-09-25 08:00:48,729 INFO L226 Difference]: Without dead ends: 83 [2020-09-25 08:00:48,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 08:00:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-25 08:00:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-09-25 08:00:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 08:00:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-09-25 08:00:48,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 71 [2020-09-25 08:00:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:48,736 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-09-25 08:00:48,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:00:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-09-25 08:00:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 08:00:48,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:48,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:48,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 08:00:48,738 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash -647246120, now seen corresponding path program 4 times [2020-09-25 08:00:48,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:48,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989377915] [2020-09-25 08:00:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:48,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:49,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:53,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:53,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 08:00:53,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:00:53,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 08:00:53,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:53,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 08:00:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 08:00:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 08:00:53,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:53,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:53,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:53,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:53,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:53,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:53,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:00:53,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:53,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:53,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:53,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:53,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:53,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:53,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:53,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:53,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:53,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 08:00:53,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:53,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:53,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 08:00:54,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989377915] [2020-09-25 08:00:54,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:54,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 08:00:54,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565832952] [2020-09-25 08:00:54,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 08:00:54,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 08:00:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-25 08:00:54,008 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 15 states. [2020-09-25 08:00:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:00:54,451 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-09-25 08:00:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 08:00:54,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-09-25 08:00:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:00:54,453 INFO L225 Difference]: With dead ends: 117 [2020-09-25 08:00:54,453 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 08:00:54,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-09-25 08:00:54,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 08:00:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2020-09-25 08:00:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 08:00:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2020-09-25 08:00:54,461 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 76 [2020-09-25 08:00:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:00:54,463 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2020-09-25 08:00:54,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 08:00:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2020-09-25 08:00:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 08:00:54,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:00:54,468 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:00:54,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 08:00:54,471 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:00:54,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:00:54,471 INFO L82 PathProgramCache]: Analyzing trace with hash 335595481, now seen corresponding path program 5 times [2020-09-25 08:00:54,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:00:54,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646571718] [2020-09-25 08:00:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:00:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:54,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:59,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:59,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 08:00:59,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 08:00:59,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 08:00:59,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:59,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:59,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 08:00:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 08:00:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 08:00:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:00:59,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:00:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:59,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:59,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:59,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:00:59,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:00:59,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:00:59,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:59,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:59,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:59,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 08:00:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:00:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:59,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:00:59,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:00:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:00:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:00:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:00:59,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:00:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 08:00:59,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646571718] [2020-09-25 08:00:59,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:00:59,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 08:00:59,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558076143] [2020-09-25 08:00:59,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 08:00:59,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:00:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 08:00:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:00:59,813 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 17 states.