/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:06:10,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:06:10,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:06:10,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:06:10,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:06:10,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:06:10,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:06:10,660 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:06:10,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:06:10,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:06:10,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:06:10,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:06:10,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:06:10,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:06:10,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:06:10,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:06:10,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:06:10,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:06:10,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:06:10,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:06:10,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:06:10,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:06:10,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:06:10,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:06:10,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:06:10,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:06:10,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:06:10,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:06:10,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:06:10,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:06:10,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:06:10,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:06:10,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:06:10,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:06:10,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:06:10,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:06:10,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:06:10,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:06:10,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:06:10,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:06:10,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:06:10,733 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 10:06:10,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:06:10,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:06:10,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:06:10,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:06:10,781 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:06:10,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:06:10,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:06:10,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:06:10,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:06:10,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:06:10,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:06:10,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:06:10,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:06:10,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:06:10,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:06:10,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:06:10,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:06:10,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:06:10,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:06:10,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:06:10,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:06:10,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:06:10,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:06:10,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:06:10,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:06:10,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:06:10,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:06:10,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:06:10,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:06:10,788 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:06:11,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:06:11,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:06:11,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:06:11,289 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:06:11,289 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:06:11,290 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-25 10:06:11,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c93e02c5/69d28df87c6e4fc6b01009a65b059f56/FLAGd3115d97e [2020-09-25 10:06:12,086 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:06:12,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2020-09-25 10:06:12,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c93e02c5/69d28df87c6e4fc6b01009a65b059f56/FLAGd3115d97e [2020-09-25 10:06:12,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c93e02c5/69d28df87c6e4fc6b01009a65b059f56 [2020-09-25 10:06:12,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:06:12,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:06:12,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:12,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:06:12,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:06:12,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:12" (1/1) ... [2020-09-25 10:06:12,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:12, skipping insertion in model container [2020-09-25 10:06:12,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:06:12" (1/1) ... [2020-09-25 10:06:12,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:06:12,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:06:12,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:12,834 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:06:13,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:06:13,141 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:06:13,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13 WrapperNode [2020-09-25 10:06:13,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:06:13,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:06:13,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:06:13,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:06:13,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (1/1) ... [2020-09-25 10:06:13,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:06:13,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:06:13,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:06:13,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:06:13,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (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 10:06:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:06:13,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:06:13,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 10:06:13,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:06:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 10:06:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:06:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 10:06:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 10:06:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:06:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:06:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:06:15,196 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:06:15,196 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 10:06:15,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:15 BoogieIcfgContainer [2020-09-25 10:06:15,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:06:15,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:06:15,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:06:15,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:06:15,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:06:12" (1/3) ... [2020-09-25 10:06:15,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ca7549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:15, skipping insertion in model container [2020-09-25 10:06:15,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:06:13" (2/3) ... [2020-09-25 10:06:15,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ca7549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:06:15, skipping insertion in model container [2020-09-25 10:06:15,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:06:15" (3/3) ... [2020-09-25 10:06:15,229 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label07.c [2020-09-25 10:06:15,242 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:06:15,263 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:06:15,286 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:06:15,337 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:06:15,338 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:06:15,338 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:06:15,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:06:15,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:06:15,339 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:06:15,339 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:06:15,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:06:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 10:06:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-25 10:06:15,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:15,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:15,400 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:15,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1257233759, now seen corresponding path program 1 times [2020-09-25 10:06:15,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:15,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859035075] [2020-09-25 10:06:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:15,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:17,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:20,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:20,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-09-25 10:06:20,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:06:20,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 10:06:20,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:20,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:06:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 10:06:20,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-09-25 10:06:20,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:06:20,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:20,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:21,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:21,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:06:21,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:21,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-25 10:06:21,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:21,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:06:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:21,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 10:06:21,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:21,062 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 10:06:21,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859035075] [2020-09-25 10:06:21,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:06:21,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 10:06:21,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222605091] [2020-09-25 10:06:21,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 10:06:21,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 10:06:21,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 10:06:21,097 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 10:06:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:23,386 INFO L93 Difference]: Finished difference Result 1270 states and 1669 transitions. [2020-09-25 10:06:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:06:23,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-09-25 10:06:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:23,415 INFO L225 Difference]: With dead ends: 1270 [2020-09-25 10:06:23,416 INFO L226 Difference]: Without dead ends: 696 [2020-09-25 10:06:23,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:06:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-09-25 10:06:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 603. [2020-09-25 10:06:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-09-25 10:06:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 731 transitions. [2020-09-25 10:06:23,532 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 731 transitions. Word has length 132 [2020-09-25 10:06:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:23,533 INFO L479 AbstractCegarLoop]: Abstraction has 603 states and 731 transitions. [2020-09-25 10:06:23,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 10:06:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 731 transitions. [2020-09-25 10:06:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-25 10:06:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:23,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:06:23,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:06:23,547 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1159952749, now seen corresponding path program 1 times [2020-09-25 10:06:23,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:23,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166219483] [2020-09-25 10:06:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:23,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:28,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:28,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-09-25 10:06:28,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:06:28,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-25 10:06:28,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:28,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:28,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 10:06:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 10:06:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-09-25 10:06:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:06:29,336 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-09-25 10:06:29,518 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-09-25 10:06:29,659 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-09-25 10:06:29,815 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-09-25 10:06:29,974 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-09-25 10:06:30,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:30,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:06:30,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:30,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 10:06:30,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:30,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:06:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:30,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:06:30,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:30,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:06:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:30,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:30,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 10:06:30,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:06:30,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-25 10:06:30,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:30,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:30,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:06:30,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:30,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:06:30,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:06:30,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166219483] [2020-09-25 10:06:30,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:30,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 10:06:30,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257397898] [2020-09-25 10:06:30,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 10:06:30,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:30,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 10:06:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-09-25 10:06:30,727 INFO L87 Difference]: Start difference. First operand 603 states and 731 transitions. Second operand 20 states. [2020-09-25 10:06:31,805 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-09-25 10:06:32,068 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 10:06:32,388 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-09-25 10:06:32,716 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-09-25 10:06:33,083 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2020-09-25 10:06:33,770 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-09-25 10:06:34,197 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2020-09-25 10:06:34,380 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-09-25 10:06:35,081 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-09-25 10:06:35,904 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-09-25 10:06:36,222 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-09-25 10:06:36,604 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-09-25 10:06:36,936 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 81 [2020-09-25 10:06:37,658 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-25 10:06:38,296 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-09-25 10:06:38,739 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-25 10:06:39,386 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-09-25 10:06:40,084 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-25 10:06:40,817 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-09-25 10:06:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:41,910 INFO L93 Difference]: Finished difference Result 1968 states and 2591 transitions. [2020-09-25 10:06:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 10:06:41,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 154 [2020-09-25 10:06:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:41,924 INFO L225 Difference]: With dead ends: 1968 [2020-09-25 10:06:41,925 INFO L226 Difference]: Without dead ends: 1389 [2020-09-25 10:06:41,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=872, Invalid=2208, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 10:06:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2020-09-25 10:06:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1280. [2020-09-25 10:06:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2020-09-25 10:06:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1533 transitions. [2020-09-25 10:06:41,992 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1533 transitions. Word has length 154 [2020-09-25 10:06:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:41,993 INFO L479 AbstractCegarLoop]: Abstraction has 1280 states and 1533 transitions. [2020-09-25 10:06:41,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 10:06:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1533 transitions. [2020-09-25 10:06:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 10:06:42,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:42,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:42,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:06:42,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:42,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1274964758, now seen corresponding path program 1 times [2020-09-25 10:06:42,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:42,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331545652] [2020-09-25 10:06:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:43,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:43,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:44,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:47,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:47,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-09-25 10:06:47,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 10:06:47,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 10:06:47,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:47,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:47,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:06:47,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 10:06:47,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-25 10:06:47,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 10:06:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:47,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:47,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:47,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:06:47,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:47,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 10:06:47,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:47,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:47,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:47,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:47,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:47,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:06:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:47,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:47,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:06:47,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:47,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 10:06:47,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:47,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:06:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:06:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:06:47,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331545652] [2020-09-25 10:06:47,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:47,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 10:06:47,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408349903] [2020-09-25 10:06:47,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:06:47,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:06:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:06:47,407 INFO L87 Difference]: Start difference. First operand 1280 states and 1533 transitions. Second operand 5 states. [2020-09-25 10:06:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:06:49,312 INFO L93 Difference]: Finished difference Result 2998 states and 3728 transitions. [2020-09-25 10:06:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:06:49,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-09-25 10:06:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:06:49,332 INFO L225 Difference]: With dead ends: 2998 [2020-09-25 10:06:49,332 INFO L226 Difference]: Without dead ends: 1742 [2020-09-25 10:06:49,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:06:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2020-09-25 10:06:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1709. [2020-09-25 10:06:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2020-09-25 10:06:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2102 transitions. [2020-09-25 10:06:49,425 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2102 transitions. Word has length 161 [2020-09-25 10:06:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:06:49,426 INFO L479 AbstractCegarLoop]: Abstraction has 1709 states and 2102 transitions. [2020-09-25 10:06:49,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:06:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2102 transitions. [2020-09-25 10:06:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-25 10:06:49,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:06:49,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:06:49,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:06:49,440 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:06:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:06:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1406452310, now seen corresponding path program 1 times [2020-09-25 10:06:49,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:06:49,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265642381] [2020-09-25 10:06:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:06:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:49,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:49,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:50,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:50,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:51,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:54,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:54,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 10:06:54,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:06:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 10:06:54,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:54,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 10:06:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-09-25 10:06:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-25 10:06:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:55,093 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-09-25 10:06:55,240 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2020-09-25 10:06:55,486 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2020-09-25 10:06:55,689 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2020-09-25 10:06:55,941 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-09-25 10:06:56,184 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-09-25 10:06:56,495 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-09-25 10:06:56,764 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 42 [2020-09-25 10:06:56,988 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 42 [2020-09-25 10:06:57,208 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-09-25 10:06:57,489 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-09-25 10:06:57,705 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2020-09-25 10:06:57,887 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-09-25 10:06:57,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:06:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:57,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:57,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 10:06:57,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:57,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:06:57,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:57,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:57,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:06:58,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 10:06:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:58,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:58,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 10:06:58,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:58,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 10:06:58,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:58,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:06:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:58,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:06:58,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:58,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:06:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:06:58,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:06:58,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:06:58,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 10:06:58,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:06:58,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-25 10:06:58,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:06:58,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:06:58,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:06:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:06:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:06:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:06:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 10:06:58,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265642381] [2020-09-25 10:06:58,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:06:58,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 10:06:58,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557521502] [2020-09-25 10:06:58,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 10:06:58,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:06:58,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 10:06:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:06:58,618 INFO L87 Difference]: Start difference. First operand 1709 states and 2102 transitions. Second operand 21 states. [2020-09-25 10:07:00,021 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-09-25 10:07:00,189 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-09-25 10:07:00,570 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-09-25 10:07:01,330 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-09-25 10:07:01,817 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97