/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=LOWLEXORDER --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_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:14,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:14,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:14,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:14,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:14,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:14,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:14,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:14,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:14,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:14,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:14,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:14,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:14,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:14,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:14,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:14,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:14,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:14,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:14,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:14,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:14,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:14,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:14,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:14,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:14,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:14,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:14,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:14,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:14,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:14,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:14,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:14,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:14,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:14,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:14,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:14,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:14,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:14,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:14,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:14,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:14,279 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 [2020-09-24 21:40:14,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:14,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:14,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:14,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:14,334 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:14,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:14,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:14,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:14,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:14,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:14,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:14,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:14,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:14,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:14,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:14,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:14,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:14,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:14,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:14,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:14,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:14,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:14,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:14,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:14,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:14,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:14,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:14,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:14,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:14,341 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:14,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:14,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:14,887 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:14,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:14,892 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:14,893 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 21:40:14,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ece8c64fc/e5b38ad46845401ab57df13b53d0c713/FLAG7b55e840f [2020-09-24 21:40:15,655 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:15,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2020-09-24 21:40:15,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ece8c64fc/e5b38ad46845401ab57df13b53d0c713/FLAG7b55e840f [2020-09-24 21:40:15,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ece8c64fc/e5b38ad46845401ab57df13b53d0c713 [2020-09-24 21:40:15,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:15,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:15,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:15,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:15,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:15,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:15" (1/1) ... [2020-09-24 21:40:15,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a48022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:15, skipping insertion in model container [2020-09-24 21:40:15,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:15" (1/1) ... [2020-09-24 21:40:15,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:15,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:16,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:16,496 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:16,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:16,714 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:16,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16 WrapperNode [2020-09-24 21:40:16,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:16,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:16,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:16,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:16,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (1/1) ... [2020-09-24 21:40:16,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:16,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:16,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:16,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:16,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (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 [2020-09-24 21:40:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:16,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:16,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:18,376 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:18,376 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:18,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:18 BoogieIcfgContainer [2020-09-24 21:40:18,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:18,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:18,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:18,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:18,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:15" (1/3) ... [2020-09-24 21:40:18,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780d529b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:18, skipping insertion in model container [2020-09-24 21:40:18,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:16" (2/3) ... [2020-09-24 21:40:18,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780d529b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:18, skipping insertion in model container [2020-09-24 21:40:18,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:18" (3/3) ... [2020-09-24 21:40:18,398 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2020-09-24 21:40:18,411 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:18,423 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:18,447 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:18,490 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:18,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:18,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:18,491 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:18,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:18,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:18,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:18,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-24 21:40:18,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:18,548 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] [2020-09-24 21:40:18,549 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash 249673445, now seen corresponding path program 1 times [2020-09-24 21:40:18,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:18,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754882978] [2020-09-24 21:40:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:18,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:22,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:23,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-09-24 21:40:23,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:23,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 21:40:23,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:23,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:23,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:24,651 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-09-24 21:40:24,809 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-09-24 21:40:25,022 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2020-09-24 21:40:25,194 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2020-09-24 21:40:25,365 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 34 [2020-09-24 21:40:25,535 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2020-09-24 21:40:25,671 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2020-09-24 21:40:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:25,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:25,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 21:40:25,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:25,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:25,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:25,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:26,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754882978] [2020-09-24 21:40:26,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:26,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:26,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332076443] [2020-09-24 21:40:26,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:26,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:26,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:26,225 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:26,488 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-09-24 21:40:26,657 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:40:26,932 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:40:27,239 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2020-09-24 21:40:27,575 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2020-09-24 21:40:28,148 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2020-09-24 21:40:29,227 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-09-24 21:40:29,829 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:40:30,633 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-09-24 21:40:31,256 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2020-09-24 21:40:32,344 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-09-24 21:40:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:35,429 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:40:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:40:35,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-09-24 21:40:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:35,460 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:40:35,461 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:40:35,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:40:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:40:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:40:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:40:35,614 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 107 [2020-09-24 21:40:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:35,615 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:40:35,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:40:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 21:40:35,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:35,627 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:40:35,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:35,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:35,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1260031962, now seen corresponding path program 1 times [2020-09-24 21:40:35,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:35,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306551410] [2020-09-24 21:40:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:35,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:36,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:37,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:40,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 21:40:40,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:40:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:40:40,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:40,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:40:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:40:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-24 21:40:40,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:40,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:40,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:40,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:40,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:40:40,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:40,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:40:40,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:40,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:40,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:40,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:40,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:40,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:40,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:40:40,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:40,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:40,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:40,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:40:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:40,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:41,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:41,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:41,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:41,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 21:40:41,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:41,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:41,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:41,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-24 21:40:41,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306551410] [2020-09-24 21:40:41,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:41,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:40:41,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891175305] [2020-09-24 21:40:41,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:40:41,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:40:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:40:41,094 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 6 states. [2020-09-24 21:40:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:43,038 INFO L93 Difference]: Finished difference Result 2382 states and 2886 transitions. [2020-09-24 21:40:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:40:43,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2020-09-24 21:40:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:43,060 INFO L225 Difference]: With dead ends: 2382 [2020-09-24 21:40:43,061 INFO L226 Difference]: Without dead ends: 1485 [2020-09-24 21:40:43,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:40:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2020-09-24 21:40:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1281. [2020-09-24 21:40:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-09-24 21:40:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1534 transitions. [2020-09-24 21:40:43,171 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1534 transitions. Word has length 145 [2020-09-24 21:40:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:43,174 INFO L479 AbstractCegarLoop]: Abstraction has 1281 states and 1534 transitions. [2020-09-24 21:40:43,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:40:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1534 transitions. [2020-09-24 21:40:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-24 21:40:43,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:43,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:43,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:43,193 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash 281598029, now seen corresponding path program 1 times [2020-09-24 21:40:43,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:43,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140275696] [2020-09-24 21:40:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:43,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:48,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 21:40:48,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:40:48,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-09-24 21:40:48,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:48,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:40:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:48,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 21:40:48,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:48,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:48,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:48,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:48,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:48,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:40:48,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:40:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:40:48,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:48,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:48,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:48,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:48,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 21:40:48,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:48,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:48,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:48,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:48,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:40:48,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:48,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 21:40:48,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:48,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-24 21:40:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:40:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 21:40:48,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140275696] [2020-09-24 21:40:48,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:48,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:40:48,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607577597] [2020-09-24 21:40:48,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:40:48,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:40:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:40:48,843 INFO L87 Difference]: Start difference. First operand 1281 states and 1534 transitions. Second operand 8 states. [2020-09-24 21:40:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:51,934 INFO L93 Difference]: Finished difference Result 3054 states and 3712 transitions. [2020-09-24 21:40:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 21:40:51,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 158 [2020-09-24 21:40:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:51,949 INFO L225 Difference]: With dead ends: 3054 [2020-09-24 21:40:51,949 INFO L226 Difference]: Without dead ends: 1861 [2020-09-24 21:40:51,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:40:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2020-09-24 21:40:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1653. [2020-09-24 21:40:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1653 states. [2020-09-24 21:40:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 1966 transitions. [2020-09-24 21:40:52,020 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 1966 transitions. Word has length 158 [2020-09-24 21:40:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:52,021 INFO L479 AbstractCegarLoop]: Abstraction has 1653 states and 1966 transitions. [2020-09-24 21:40:52,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:40:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 1966 transitions. [2020-09-24 21:40:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 21:40:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:52,029 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:40:52,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:52,029 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:52,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1334073201, now seen corresponding path program 1 times [2020-09-24 21:40:52,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:52,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907270830] [2020-09-24 21:40:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:52,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-09-24 21:40:53,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:53,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-09-24 21:40:53,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-24 21:40:53,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:40:53,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:53,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:53,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:53,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:40:53,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:40:53,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:53,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:40:53,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:53,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:53,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:40:53,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 21:40:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:53,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:40:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:53,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:53,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 21:40:53,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:53,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-24 21:40:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:40:53,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:53,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 21:40:53,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:40:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 21:40:53,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:40:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 62 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-24 21:40:53,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907270830] [2020-09-24 21:40:53,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:53,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:40:53,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803192526] [2020-09-24 21:40:53,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:40:53,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:53,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:40:53,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:40:53,522 INFO L87 Difference]: Start difference. First operand 1653 states and 1966 transitions. Second operand 7 states. [2020-09-24 21:40:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:56,000 INFO L93 Difference]: Finished difference Result 3908 states and 4799 transitions. [2020-09-24 21:40:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:40:56,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 175 [2020-09-24 21:40:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:56,013 INFO L225 Difference]: With dead ends: 3908 [2020-09-24 21:40:56,013 INFO L226 Difference]: Without dead ends: 2343 [2020-09-24 21:40:56,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:40:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2020-09-24 21:40:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2241. [2020-09-24 21:40:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-09-24 21:40:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 2755 transitions. [2020-09-24 21:40:56,089 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 2755 transitions. Word has length 175 [2020-09-24 21:40:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:56,089 INFO L479 AbstractCegarLoop]: Abstraction has 2241 states and 2755 transitions. [2020-09-24 21:40:56,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:40:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 2755 transitions. [2020-09-24 21:40:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-09-24 21:40:56,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:56,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:56,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:40:56,100 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -810709778, now seen corresponding path program 1 times [2020-09-24 21:40:56,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:56,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506010538] [2020-09-24 21:40:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:56,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:57,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-24 21:41:01,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:41:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:41:01,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:41:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 21:41:01,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:01,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:01,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:01,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:01,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:01,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:41:01,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:41:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:41:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:01,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:01,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:01,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:01,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 21:41:01,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:01,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:01,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:01,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:01,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:41:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:01,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:01,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:01,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 21:41:01,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:01,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:41:01,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-24 21:41:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:01,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 21:41:01,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:01,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 21:41:01,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:01,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:41:01,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 21:41:01,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:41:01,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 67 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 21:41:01,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506010538] [2020-09-24 21:41:01,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:01,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:41:01,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920954388] [2020-09-24 21:41:01,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:41:01,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:41:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:41:01,697 INFO L87 Difference]: Start difference. First operand 2241 states and 2755 transitions. Second operand 10 states. [2020-09-24 21:41:02,297 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-09-24 21:41:02,913 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63