/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:09:48,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:09:48,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:09:48,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:09:48,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:09:48,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:09:48,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:09:48,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:09:48,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:09:48,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:09:48,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:09:48,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:09:48,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:09:48,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:09:48,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:09:48,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:09:48,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:09:48,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:09:48,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:09:48,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:09:48,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:09:48,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:09:48,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:09:48,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:09:48,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:09:48,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:09:48,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:09:48,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:09:48,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:09:48,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:09:48,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:09:48,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:09:48,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:09:48,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:09:48,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:09:48,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:09:48,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:09:48,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:09:48,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:09:48,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:09:48,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:09:48,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:09:48,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:09:48,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:09:48,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:09:48,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:09:48,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:09:48,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:09:48,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:09:48,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:09:48,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:09:48,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:09:48,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:09:48,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:09:48,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:09:48,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:09:48,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:09:48,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:09:48,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:09:48,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:09:48,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:09:48,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:09:48,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:09:48,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:09:48,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:09:48,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:09:48,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:09:48,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:09:48,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:09:48,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:09:48,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:09:48,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:09:48,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:09:48,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:09:48,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:09:48,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:09:48,722 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:09:48,723 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label45.c [2020-10-13 10:09:48,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf8b6070/e141f4f333564f87a7e24fe5064cf0f7/FLAG06e22be8e [2020-10-13 10:09:49,903 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:09:49,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label45.c [2020-10-13 10:09:49,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf8b6070/e141f4f333564f87a7e24fe5064cf0f7/FLAG06e22be8e [2020-10-13 10:09:50,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1cf8b6070/e141f4f333564f87a7e24fe5064cf0f7 [2020-10-13 10:09:50,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:09:50,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:09:50,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:50,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:09:50,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:09:50,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:50" (1/1) ... [2020-10-13 10:09:50,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e14926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:50, skipping insertion in model container [2020-10-13 10:09:50,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:09:50" (1/1) ... [2020-10-13 10:09:50,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:09:50,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:09:52,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:52,981 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:09:54,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:09:54,331 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:09:54,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54 WrapperNode [2020-10-13 10:09:54,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:09:54,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:09:54,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:09:54,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:09:54,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... [2020-10-13 10:09:54,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:09:54,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:09:54,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:09:54,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:09:54,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:09:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:09:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:09:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:09:54,970 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:09:54,971 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:09:54,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:09:54,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:09:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:09:54,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:09:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:09:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:09:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:09:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:09:54,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:09:54,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:09:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:09:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:09:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:09:54,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:09:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:09:54,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:10:09,545 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:10:09,546 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:10:09,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:09 BoogieIcfgContainer [2020-10-13 10:10:09,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:10:09,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:10:09,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:10:09,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:10:09,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:09:50" (1/3) ... [2020-10-13 10:10:09,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447de76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:09, skipping insertion in model container [2020-10-13 10:10:09,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:09:54" (2/3) ... [2020-10-13 10:10:09,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447de76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:10:09, skipping insertion in model container [2020-10-13 10:10:09,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:10:09" (3/3) ... [2020-10-13 10:10:09,595 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label45.c [2020-10-13 10:10:09,613 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:10:09,633 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:10:09,653 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:10:09,696 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:10:09,696 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:10:09,696 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:10:09,696 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:10:09,697 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:10:09,697 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:10:09,697 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:10:09,697 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:10:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:10:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:10:09,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:09,780 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] [2020-10-13 10:10:09,782 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:09,791 INFO L82 PathProgramCache]: Analyzing trace with hash -522385732, now seen corresponding path program 1 times [2020-10-13 10:10:09,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:09,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054217635] [2020-10-13 10:10:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:10,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:10,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:10,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 10:10:10,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-13 10:10:10,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:10,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:10:10,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:10:10,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:10:10,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:10:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:10,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:10,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:10,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:10,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:10,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:10:10,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:10,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:10,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:10,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054217635] [2020-10-13 10:10:10,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:10:10,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:10:10,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31967590] [2020-10-13 10:10:10,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:10:10,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:10:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:10:10,914 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2020-10-13 10:10:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:10:38,844 INFO L93 Difference]: Finished difference Result 5038 states and 9462 transitions. [2020-10-13 10:10:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:10:38,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-13 10:10:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:10:38,913 INFO L225 Difference]: With dead ends: 5038 [2020-10-13 10:10:38,914 INFO L226 Difference]: Without dead ends: 3197 [2020-10-13 10:10:38,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-10-13 10:10:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3192. [2020-10-13 10:10:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3192 states. [2020-10-13 10:10:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 5230 transitions. [2020-10-13 10:10:39,318 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 5230 transitions. Word has length 53 [2020-10-13 10:10:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:10:39,319 INFO L479 AbstractCegarLoop]: Abstraction has 3192 states and 5230 transitions. [2020-10-13 10:10:39,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:10:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 5230 transitions. [2020-10-13 10:10:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:10:39,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:10:39,328 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:10:39,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:10:39,329 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:10:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:10:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1707413285, now seen corresponding path program 1 times [2020-10-13 10:10:39,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:10:39,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995840612] [2020-10-13 10:10:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:10:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:39,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:40,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:41,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:42,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:42,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:42,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 10:10:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:10:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2731 [2020-10-13 10:10:42,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:42,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 10:10:42,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:42,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 10:10:42,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:10:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:42,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:42,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:42,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:10:42,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:42,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:10:42,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:42,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:10:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:10:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:10:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:42,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:10:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:10:42,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:10:42,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:10:42,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:10:42,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:10:42,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-13 10:10:42,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:10:42,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:10:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 10:10:42,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:10:42,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:10:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:10:42,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995840612] [2020-10-13 10:10:42,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:10:42,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:10:42,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458360268] [2020-10-13 10:10:42,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:10:42,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:10:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:10:42,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:10:42,520 INFO L87 Difference]: Start difference. First operand 3192 states and 5230 transitions. Second operand 5 states. [2020-10-13 10:11:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:20,166 INFO L93 Difference]: Finished difference Result 9225 states and 15296 transitions. [2020-10-13 10:11:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:20,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-10-13 10:11:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:20,213 INFO L225 Difference]: With dead ends: 9225 [2020-10-13 10:11:20,214 INFO L226 Difference]: Without dead ends: 6039 [2020-10-13 10:11:20,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:11:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6039 states. [2020-10-13 10:11:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6039 to 6024. [2020-10-13 10:11:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6024 states. [2020-10-13 10:11:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8690 transitions. [2020-10-13 10:11:20,425 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8690 transitions. Word has length 126 [2020-10-13 10:11:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:20,428 INFO L479 AbstractCegarLoop]: Abstraction has 6024 states and 8690 transitions. [2020-10-13 10:11:20,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8690 transitions. [2020-10-13 10:11:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 10:11:20,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:20,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:11:20,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:11:20,440 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash -56922798, now seen corresponding path program 1 times [2020-10-13 10:11:20,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:20,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591428052] [2020-10-13 10:11:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:20,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:21,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:21,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 10:11:21,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:11:21,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-13 10:11:21,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:21,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 10:11:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:11:21,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:21,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:21,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:21,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:21,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:21,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:11:21,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:21,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:21,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:21,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:21,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:21,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:11:21,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:21,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-13 10:11:21,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 10:11:21,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:21,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591428052] [2020-10-13 10:11:21,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:21,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:11:21,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501846300] [2020-10-13 10:11:21,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:21,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:21,829 INFO L87 Difference]: Start difference. First operand 6024 states and 8690 transitions. Second operand 5 states. [2020-10-13 10:11:57,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:11:57,834 INFO L93 Difference]: Finished difference Result 14887 states and 22088 transitions. [2020-10-13 10:11:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:11:57,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-10-13 10:11:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:11:57,876 INFO L225 Difference]: With dead ends: 14887 [2020-10-13 10:11:57,877 INFO L226 Difference]: Without dead ends: 8869 [2020-10-13 10:11:57,892 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 [2020-10-13 10:11:57,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2020-10-13 10:11:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8862. [2020-10-13 10:11:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8862 states. [2020-10-13 10:11:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8862 states to 8862 states and 11976 transitions. [2020-10-13 10:11:58,140 INFO L78 Accepts]: Start accepts. Automaton has 8862 states and 11976 transitions. Word has length 134 [2020-10-13 10:11:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:11:58,143 INFO L479 AbstractCegarLoop]: Abstraction has 8862 states and 11976 transitions. [2020-10-13 10:11:58,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:11:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8862 states and 11976 transitions. [2020-10-13 10:11:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 10:11:58,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:11:58,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:11:58,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:11:58,152 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:11:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:11:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash -662038050, now seen corresponding path program 1 times [2020-10-13 10:11:58,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:11:58,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849771595] [2020-10-13 10:11:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:11:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:58,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:58,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:59,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:59,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 10:11:59,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:11:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-10-13 10:11:59,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:11:59,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 114 [2020-10-13 10:11:59,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 10:11:59,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:11:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:59,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:59,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:59,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:11:59,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:59,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:11:59,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:59,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:11:59,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:59,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:11:59,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:11:59,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:11:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:11:59,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:11:59,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:11:59,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 10:11:59,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:11:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-13 10:11:59,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:11:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:11:59,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:11:59,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:11:59,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:11:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:11:59,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849771595] [2020-10-13 10:11:59,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:11:59,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:11:59,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211218715] [2020-10-13 10:11:59,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:11:59,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:11:59,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:11:59,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:11:59,577 INFO L87 Difference]: Start difference. First operand 8862 states and 11976 transitions. Second operand 5 states. [2020-10-13 10:12:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:12:47,288 INFO L93 Difference]: Finished difference Result 26250 states and 36068 transitions. [2020-10-13 10:12:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:12:47,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-13 10:12:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:12:47,363 INFO L225 Difference]: With dead ends: 26250 [2020-10-13 10:12:47,363 INFO L226 Difference]: Without dead ends: 17394 [2020-10-13 10:12:47,391 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 [2020-10-13 10:12:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17394 states. [2020-10-13 10:12:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17394 to 17331. [2020-10-13 10:12:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17331 states. [2020-10-13 10:12:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17331 states to 17331 states and 22109 transitions. [2020-10-13 10:12:47,829 INFO L78 Accepts]: Start accepts. Automaton has 17331 states and 22109 transitions. Word has length 157 [2020-10-13 10:12:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:12:47,840 INFO L479 AbstractCegarLoop]: Abstraction has 17331 states and 22109 transitions. [2020-10-13 10:12:47,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:12:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17331 states and 22109 transitions. [2020-10-13 10:12:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 10:12:47,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:12:47,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 10:12:47,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:12:47,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:12:47,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:12:47,849 INFO L82 PathProgramCache]: Analyzing trace with hash 996287486, now seen corresponding path program 1 times [2020-10-13 10:12:47,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:12:47,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093801589] [2020-10-13 10:12:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:12:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:47,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:48,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:50,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:50,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-13 10:12:50,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:12:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-10-13 10:12:50,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:12:50,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-13 10:12:50,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:12:50,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:50,653 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-13 10:12:50,824 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-13 10:12:50,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:12:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:50,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:50,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:50,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:12:50,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:50,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:12:50,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:12:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:50,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:12:50,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:12:51,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:12:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:12:51,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:12:51,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:12:51,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 10:12:51,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:12:51,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:12:51,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:12:51,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:12:51,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:12:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:12:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:12:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:12:51,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093801589] [2020-10-13 10:12:51,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:12:51,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:12:51,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491953242] [2020-10-13 10:12:51,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:12:51,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:12:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:12:51,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:12:51,368 INFO L87 Difference]: Start difference. First operand 17331 states and 22109 transitions. Second operand 7 states. [2020-10-13 10:12:53,919 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-13 10:12:54,449 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-13 10:13:48,074 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51