/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=0.2 --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 04:33:46,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:33:46,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:33:46,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:33:46,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:33:46,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:33:46,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:33:46,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:33:46,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:33:46,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:33:46,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:33:46,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:33:46,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:33:46,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:33:46,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:33:46,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:33:46,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:33:46,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:33:46,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:33:46,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:33:46,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:33:46,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:33:46,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:33:46,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:33:46,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:33:46,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:33:46,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:33:46,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:33:46,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:33:46,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:33:46,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:33:46,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:33:46,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:33:46,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:33:46,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:33:46,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:33:46,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:33:46,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:33:46,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:33:46,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:33:46,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:33:46,688 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 04:33:46,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:33:46,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:33:46,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:33:46,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:33:46,750 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:33:46,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:33:46,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:33:46,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:33:46,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:33:46,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:33:46,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:33:46,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:33:46,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:33:46,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:33:46,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:33:46,756 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:33:46,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:33:46,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:33:46,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:33:46,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:33:46,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:33:46,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:33:46,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:33:46,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:33:46,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:33:46,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:33:46,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:33:46,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:33:46,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:33:46,760 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:33:47,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:33:47,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:33:47,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:33:47,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:33:47,280 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:33:47,281 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 04:33:47,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f22a1412d/f905d400bfc544e0a5af4b9fc48f9be2/FLAGa22d39f55 [2020-09-25 04:33:47,877 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:33:47,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 04:33:47,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f22a1412d/f905d400bfc544e0a5af4b9fc48f9be2/FLAGa22d39f55 [2020-09-25 04:33:48,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f22a1412d/f905d400bfc544e0a5af4b9fc48f9be2 [2020-09-25 04:33:48,253 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:33:48,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:33:48,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:33:48,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:33:48,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:33:48,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f7f464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48, skipping insertion in model container [2020-09-25 04:33:48,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:33:48,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:33:48,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:33:48,563 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:33:48,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:33:48,602 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:33:48,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48 WrapperNode [2020-09-25 04:33:48,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:33:48,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:33:48,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:33:48,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:33:48,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (1/1) ... [2020-09-25 04:33:48,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:33:48,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:33:48,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:33:48,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:33:48,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (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 04:33:48,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:33:48,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:33:48,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:33:48,816 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 04:33:48,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:33:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:33:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:33:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 04:33:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 04:33:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 04:33:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 04:33:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 04:33:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:33:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:33:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 04:33:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:33:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:33:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:33:49,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:33:49,160 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 04:33:49,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:33:49 BoogieIcfgContainer [2020-09-25 04:33:49,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:33:49,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:33:49,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:33:49,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:33:49,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:33:48" (1/3) ... [2020-09-25 04:33:49,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f5a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:33:49, skipping insertion in model container [2020-09-25 04:33:49,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:33:48" (2/3) ... [2020-09-25 04:33:49,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382f5a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:33:49, skipping insertion in model container [2020-09-25 04:33:49,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:33:49" (3/3) ... [2020-09-25 04:33:49,175 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 04:33:49,187 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:33:49,196 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:33:49,216 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:33:49,244 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:33:49,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:33:49,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:33:49,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:33:49,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:33:49,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:33:49,244 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:33:49,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:33:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 04:33:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 04:33:49,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:33:49,275 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 04:33:49,275 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:33:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:33:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 04:33:49,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:33:49,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722682366] [2020-09-25 04:33:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:33:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:49,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:49,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 04:33:49,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:33:49,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-09-25 04:33:49,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:49,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 04:33:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:33:49,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:33:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:49,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:49,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:49,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:33:49,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:49,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 04:33:49,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:49,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:49,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:49,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:49,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:33:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:49,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:49,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:49,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:33:49,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:49,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 04:33:49,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:49,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 04:33:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:49,877 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 04:33:49,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722682366] [2020-09-25 04:33:49,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:33:49,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:33:49,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859638588] [2020-09-25 04:33:49,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:33:49,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:33:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:33:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:33:49,912 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 04:33:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:33:50,097 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 04:33:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:33:50,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 04:33:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:33:50,112 INFO L225 Difference]: With dead ends: 94 [2020-09-25 04:33:50,113 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 04:33:50,117 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 04:33:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 04:33:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 04:33:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 04:33:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 04:33:50,171 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 04:33:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:33:50,172 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 04:33:50,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:33:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 04:33:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 04:33:50,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:33:50,174 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 04:33:50,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:33:50,175 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:33:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:33:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-25 04:33:50,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:33:50,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745957784] [2020-09-25 04:33:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:33:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:50,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:50,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 04:33:50,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:33:50,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-09-25 04:33:50,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:50,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:50,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:33:50,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 04:33:50,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 04:33:50,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-09-25 04:33:50,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:33:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:50,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:50,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:33:50,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:50,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:33:50,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:50,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:50,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:50,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:50,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:50,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:33:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:50,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:50,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:50,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:50,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:33:50,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:33:50,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 04:33:50,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:50,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:50,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:50,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:50,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:50,684 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 04:33:50,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745957784] [2020-09-25 04:33:50,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:33:50,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:33:50,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039659340] [2020-09-25 04:33:50,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:33:50,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:33:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:33:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:33:50,692 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-25 04:33:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:33:50,903 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-25 04:33:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:33:50,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 04:33:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:33:50,909 INFO L225 Difference]: With dead ends: 83 [2020-09-25 04:33:50,910 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 04:33:50,912 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 04:33:50,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 04:33:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 04:33:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 04:33:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 04:33:50,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 04:33:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:33:50,945 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 04:33:50,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:33:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 04:33:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 04:33:50,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:33:50,948 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 04:33:50,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:33:50,949 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:33:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:33:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 04:33:50,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:33:50,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912248976] [2020-09-25 04:33:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:33:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:50,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:52,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:52,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 04:33:52,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:33:52,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-09-25 04:33:52,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:52,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:52,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:33:52,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 04:33:52,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 04:33:52,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:52,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:33:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:52,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:52,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:33:52,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:52,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:33:52,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:52,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:52,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:52,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:52,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:52,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:33:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:52,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:52,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:52,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:33:52,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:33:52,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 04:33:52,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:52,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:52,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:52,607 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 04:33:52,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912248976] [2020-09-25 04:33:52,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:33:52,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:33:52,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272150838] [2020-09-25 04:33:52,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:33:52,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:33:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:33:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:33:52,610 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-25 04:33:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:33:52,848 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-25 04:33:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 04:33:52,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-25 04:33:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:33:52,850 INFO L225 Difference]: With dead ends: 92 [2020-09-25 04:33:52,850 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 04:33:52,851 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 04:33:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 04:33:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2020-09-25 04:33:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 04:33:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-09-25 04:33:52,860 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 36 [2020-09-25 04:33:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:33:52,860 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-09-25 04:33:52,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:33:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-09-25 04:33:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 04:33:52,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:33:52,863 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 04:33:52,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:33:52,863 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:33:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:33:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1465690975, now seen corresponding path program 2 times [2020-09-25 04:33:52,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:33:52,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023246621] [2020-09-25 04:33:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:33:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:52,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:52,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:55,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:55,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 04:33:55,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:33:55,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2262 [2020-09-25 04:33:55,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:55,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:33:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:33:55,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:33:55,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:55,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:33:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:55,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:55,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:55,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:33:55,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:33:55,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:55,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:55,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:33:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:33:55,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:33:55,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:33:55,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:33:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:55,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:33:55,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:33:55,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:33:55,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 04:33:55,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:33:55,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:33:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:33:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 04:33:55,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 04:33:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:33:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 04:33:55,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023246621] [2020-09-25 04:33:55,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:33:55,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 04:33:55,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565833926] [2020-09-25 04:33:55,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:33:55,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:33:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:33:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:33:55,274 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 7 states. [2020-09-25 04:33:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:33:55,566 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-09-25 04:33:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 04:33:55,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-09-25 04:33:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:33:55,568 INFO L225 Difference]: With dead ends: 101 [2020-09-25 04:33:55,568 INFO L226 Difference]: Without dead ends: 64 [2020-09-25 04:33:55,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:33:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-25 04:33:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-09-25 04:33:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 04:33:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 04:33:55,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2020-09-25 04:33:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:33:55,576 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 04:33:55,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:33:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 04:33:55,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 04:33:55,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:33:55,579 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, 1, 1, 1, 1, 1, 1] [2020-09-25 04:33:55,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:33:55,579 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:33:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:33:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -625919587, now seen corresponding path program 1 times [2020-09-25 04:33:55,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:33:55,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159948803] [2020-09-25 04:33:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:33:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:33:55,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:55,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:59,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:33:59,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:00,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:00,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 04:34:00,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:34:00,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 04:34:00,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:00,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:34:00,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 04:34:00,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 04:34:00,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:34:00,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:00,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:00,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:00,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:34:00,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:00,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:00,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:00,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:00,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:00,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:00,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:00,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:00,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 04:34:00,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:00,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-25 04:34:00,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:00,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:00,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:00,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:34:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:34:00,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159948803] [2020-09-25 04:34:00,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:00,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:34:00,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725478557] [2020-09-25 04:34:00,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:34:00,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:00,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:34:00,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:34:00,816 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 9 states. [2020-09-25 04:34:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:01,096 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2020-09-25 04:34:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 04:34:01,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 04:34:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:01,098 INFO L225 Difference]: With dead ends: 99 [2020-09-25 04:34:01,099 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 04:34:01,099 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 04:34:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 04:34:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-25 04:34:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 04:34:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-09-25 04:34:01,113 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 49 [2020-09-25 04:34:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:01,116 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-09-25 04:34:01,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:34:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-09-25 04:34:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 04:34:01,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:01,118 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 04:34:01,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:34:01,118 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash 938976628, now seen corresponding path program 2 times [2020-09-25 04:34:01,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:01,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382535093] [2020-09-25 04:34:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:01,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:01,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:01,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:01,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:03,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:06,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 04:34:06,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:34:06,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 04:34:06,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:06,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:06,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:34:06,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:34:06,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 04:34:06,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:06,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:06,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:06,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:06,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:34:06,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:06,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:06,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:06,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:06,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:06,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:06,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:06,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 04:34:06,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 04:34:06,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:06,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:34:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 04:34:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:34:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 04:34:06,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382535093] [2020-09-25 04:34:06,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:06,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 04:34:06,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72657922] [2020-09-25 04:34:06,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 04:34:06,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 04:34:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 04:34:06,329 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 9 states. [2020-09-25 04:34:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:06,608 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2020-09-25 04:34:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:34:06,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-09-25 04:34:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:06,610 INFO L225 Difference]: With dead ends: 125 [2020-09-25 04:34:06,610 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 04:34:06,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-25 04:34:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 04:34:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-09-25 04:34:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 04:34:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-25 04:34:06,627 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 56 [2020-09-25 04:34:06,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:06,628 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-25 04:34:06,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 04:34:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-25 04:34:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 04:34:06,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:06,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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 04:34:06,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:34:06,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:06,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1626257912, now seen corresponding path program 3 times [2020-09-25 04:34:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:06,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630633500] [2020-09-25 04:34:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:06,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:11,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 04:34:11,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 04:34:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 04:34:11,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:11,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:11,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:34:11,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 04:34:11,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 04:34:11,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:11,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:11,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:11,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:11,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:11,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:34:11,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:11,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:11,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:11,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:11,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:11,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:11,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:11,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:11,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:11,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:34:11,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:11,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-25 04:34:11,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:11,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:11,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:11,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:11,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 04:34:11,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630633500] [2020-09-25 04:34:11,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:11,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 04:34:11,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169722954] [2020-09-25 04:34:11,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 04:34:11,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 04:34:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:34:11,925 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 11 states. [2020-09-25 04:34:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:12,191 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-09-25 04:34:12,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 04:34:12,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 04:34:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:12,193 INFO L225 Difference]: With dead ends: 113 [2020-09-25 04:34:12,193 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 04:34:12,194 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 04:34:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 04:34:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-09-25 04:34:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 04:34:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-09-25 04:34:12,210 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 62 [2020-09-25 04:34:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:12,210 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-09-25 04:34:12,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 04:34:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-09-25 04:34:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 04:34:12,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:12,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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 04:34:12,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 04:34:12,216 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 647305401, now seen corresponding path program 4 times [2020-09-25 04:34:12,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:12,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835662930] [2020-09-25 04:34:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:12,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:15,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:16,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:17,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:17,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 04:34:17,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 04:34:17,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 04:34:17,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:17,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:34:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:34:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 04:34:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:17,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:17,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:17,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:17,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:17,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:34:17,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:17,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:17,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:17,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:17,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:17,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:17,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:34:17,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:17,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-25 04:34:17,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:17,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:17,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:34:17,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 04:34:17,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 04:34:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 04:34:17,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835662930] [2020-09-25 04:34:17,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:17,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 04:34:17,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093146247] [2020-09-25 04:34:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 04:34:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:17,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 04:34:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:34:17,575 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 11 states. [2020-09-25 04:34:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:17,942 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-09-25 04:34:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 04:34:17,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-09-25 04:34:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:17,944 INFO L225 Difference]: With dead ends: 149 [2020-09-25 04:34:17,944 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 04:34:17,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-09-25 04:34:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 04:34:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-25 04:34:17,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 04:34:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-25 04:34:17,958 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 69 [2020-09-25 04:34:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:17,958 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-25 04:34:17,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 04:34:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-25 04:34:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 04:34:17,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:17,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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 04:34:17,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 04:34:17,960 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:17,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:17,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1360689845, now seen corresponding path program 5 times [2020-09-25 04:34:17,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:17,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183948409] [2020-09-25 04:34:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:17,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:19,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 04:34:22,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 04:34:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 04:34:22,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:22,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 04:34:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:34:22,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 04:34:22,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:23,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:23,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:23,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:23,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:23,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:23,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:34:23,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:23,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:23,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:23,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:23,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:34:23,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:23,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:23,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:23,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:23,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:23,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:24,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:24,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:24,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:27,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:27,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 04:34:27,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:34:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3986 [2020-09-25 04:34:27,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:27,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 04:34:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 04:34:27,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:34:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-09-25 04:34:27,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183948409] [2020-09-25 04:34:27,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:27,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 04:34:27,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19791309] [2020-09-25 04:34:27,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 04:34:27,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 04:34:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:34:27,280 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 13 states. [2020-09-25 04:34:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:27,641 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2020-09-25 04:34:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:34:27,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-25 04:34:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:27,643 INFO L225 Difference]: With dead ends: 143 [2020-09-25 04:34:27,643 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 04:34:27,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-25 04:34:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 04:34:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-09-25 04:34:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 04:34:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-09-25 04:34:27,650 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 75 [2020-09-25 04:34:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:27,650 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-09-25 04:34:27,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 04:34:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-09-25 04:34:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 04:34:27,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:27,652 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2020-09-25 04:34:27,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 04:34:27,652 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1831902532, now seen corresponding path program 1 times [2020-09-25 04:34:27,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:27,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051030994] [2020-09-25 04:34:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:27,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:28,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:32,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:32,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 04:34:32,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 04:34:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-25 04:34:32,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:32,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 04:34:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 04:34:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 04:34:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:34:32,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:32,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:32,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:32,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:34:32,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:32,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:32,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:32,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:34:32,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 04:34:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:32,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:32,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:32,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:32,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:32,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:34:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 04:34:32,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051030994] [2020-09-25 04:34:32,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:32,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 04:34:32,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449662986] [2020-09-25 04:34:32,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 04:34:32,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 04:34:32,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 04:34:32,967 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 13 states. [2020-09-25 04:34:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:33,337 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-09-25 04:34:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 04:34:33,338 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-09-25 04:34:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:33,340 INFO L225 Difference]: With dead ends: 127 [2020-09-25 04:34:33,340 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 04:34:33,341 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 04:34:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 04:34:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-09-25 04:34:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 04:34:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-09-25 04:34:33,347 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 76 [2020-09-25 04:34:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:33,347 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-09-25 04:34:33,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 04:34:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-09-25 04:34:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 04:34:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:33,349 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2020-09-25 04:34:33,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 04:34:33,349 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:33,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2133383187, now seen corresponding path program 2 times [2020-09-25 04:34:33,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:33,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683016693] [2020-09-25 04:34:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:33,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:33,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:33,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking...