/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/Problem02_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:44,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:44,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:44,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:44,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:44,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:44,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:44,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:44,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:44,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:44,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:44,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:44,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:44,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:44,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:44,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:44,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:44,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:44,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:44,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:44,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:44,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:44,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:44,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:44,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:44,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:44,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:44,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:44,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:44,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:44,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:44,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:44,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:44,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:44,396 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:44,396 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:44,397 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:44,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:44,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:44,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:44,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:44,413 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 21:43:44,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:44,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:44,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:44,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:44,466 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:44,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:44,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:44,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:44,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:44,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:44,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:44,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:44,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:44,469 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:44,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:44,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:44,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:44,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:44,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:44,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:44,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:44,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:44,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:44,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:44,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:44,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:44,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:44,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:44,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:44,473 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 21:43:44,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:44,993 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:45,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:45,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:45,003 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:45,004 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2020-09-24 21:43:45,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c010ad43/ede6bc69e1e040d1a713529dee1cec42/FLAG3a5b3360c [2020-09-24 21:43:45,723 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:45,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label53.c [2020-09-24 21:43:45,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c010ad43/ede6bc69e1e040d1a713529dee1cec42/FLAG3a5b3360c [2020-09-24 21:43:45,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c010ad43/ede6bc69e1e040d1a713529dee1cec42 [2020-09-24 21:43:45,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:45,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:45,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:45,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:45,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:45,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:45" (1/1) ... [2020-09-24 21:43:45,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a03fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:45, skipping insertion in model container [2020-09-24 21:43:45,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:45" (1/1) ... [2020-09-24 21:43:45,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:46,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:46,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:46,524 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:46,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:46,776 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:46,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46 WrapperNode [2020-09-24 21:43:46,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:46,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:46,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:46,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:46,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (1/1) ... [2020-09-24 21:43:46,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:46,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:46,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:46,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:46,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (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 21:43:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:46,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:48,416 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:48,417 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:48,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:48 BoogieIcfgContainer [2020-09-24 21:43:48,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:48,427 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:48,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:48,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:48,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:45" (1/3) ... [2020-09-24 21:43:48,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5510976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:48, skipping insertion in model container [2020-09-24 21:43:48,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:46" (2/3) ... [2020-09-24 21:43:48,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5510976b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:48, skipping insertion in model container [2020-09-24 21:43:48,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:48" (3/3) ... [2020-09-24 21:43:48,436 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label53.c [2020-09-24 21:43:48,448 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:48,460 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:48,483 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:48,521 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:48,522 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:48,522 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:48,522 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:48,522 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:48,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:48,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:48,523 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-09-24 21:43:48,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:48,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:43:48,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:48,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1669931929, now seen corresponding path program 1 times [2020-09-24 21:43:48,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:48,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136863733] [2020-09-24 21:43:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:49,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:51,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:53,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:53,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-09-24 21:43:53,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:53,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:43:53,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:53,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:53,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:43:54,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:54,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:54,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:54,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:54,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:54,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 21:43:54,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:55,004 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 21:43:55,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136863733] [2020-09-24 21:43:55,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:55,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:43:55,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341519914] [2020-09-24 21:43:55,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:43:55,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:43:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:43:55,043 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:43:55,467 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-09-24 21:43:55,636 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-09-24 21:43:55,818 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-09-24 21:43:56,031 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-09-24 21:43:56,264 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2020-09-24 21:43:56,632 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-09-24 21:43:56,869 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-09-24 21:43:57,244 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-09-24 21:43:58,382 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 75 [2020-09-24 21:43:58,590 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-09-24 21:43:58,851 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:43:59,534 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-09-24 21:44:00,002 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-09-24 21:44:00,176 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:44:01,093 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:44:01,500 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:44:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:03,950 INFO L93 Difference]: Finished difference Result 1860 states and 2652 transitions. [2020-09-24 21:44:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:44:03,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 164 [2020-09-24 21:44:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:03,988 INFO L225 Difference]: With dead ends: 1860 [2020-09-24 21:44:03,988 INFO L226 Difference]: Without dead ends: 1230 [2020-09-24 21:44:04,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=470, Invalid=1252, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 21:44:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-09-24 21:44:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1070. [2020-09-24 21:44:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:44:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1287 transitions. [2020-09-24 21:44:04,134 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1287 transitions. Word has length 164 [2020-09-24 21:44:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:04,135 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1287 transitions. [2020-09-24 21:44:04,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:44:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1287 transitions. [2020-09-24 21:44:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-24 21:44:04,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:04,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:04,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:44:04,146 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1632286597, now seen corresponding path program 1 times [2020-09-24 21:44:04,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:04,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138599728] [2020-09-24 21:44:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:05,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:09,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-09-24 21:44:09,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:44:09,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 21:44:09,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:09,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:09,808 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:44:10,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:10,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:10,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:10,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:10,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:44:10,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:10,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:10,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:10,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:10,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:10,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:10,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 21:44:10,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:10,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:10,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:10,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:44:10,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138599728] [2020-09-24 21:44:10,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:10,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:44:10,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117643219] [2020-09-24 21:44:10,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:44:10,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:44:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:44:10,991 INFO L87 Difference]: Start difference. First operand 1070 states and 1287 transitions. Second operand 19 states. [2020-09-24 21:44:11,889 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:44:12,401 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-09-24 21:44:12,717 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-09-24 21:44:12,935 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-09-24 21:44:13,464 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-09-24 21:44:13,776 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-09-24 21:44:14,269 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-09-24 21:44:14,572 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-24 21:44:14,891 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-09-24 21:44:15,744 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-09-24 21:44:16,410 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-09-24 21:44:16,858 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:44:17,785 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-09-24 21:44:18,540 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-09-24 21:44:19,017 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-09-24 21:44:19,379 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-09-24 21:44:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:21,201 INFO L93 Difference]: Finished difference Result 4039 states and 5374 transitions. [2020-09-24 21:44:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:44:21,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 186 [2020-09-24 21:44:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:21,219 INFO L225 Difference]: With dead ends: 4039 [2020-09-24 21:44:21,220 INFO L226 Difference]: Without dead ends: 3049 [2020-09-24 21:44:21,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:44:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2020-09-24 21:44:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2832. [2020-09-24 21:44:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2020-09-24 21:44:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3405 transitions. [2020-09-24 21:44:21,324 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3405 transitions. Word has length 186 [2020-09-24 21:44:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:21,325 INFO L479 AbstractCegarLoop]: Abstraction has 2832 states and 3405 transitions. [2020-09-24 21:44:21,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3405 transitions. [2020-09-24 21:44:21,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 21:44:21,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:21,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:44:21,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:21,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash 749242086, now seen corresponding path program 1 times [2020-09-24 21:44:21,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:21,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880953800] [2020-09-24 21:44:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:21,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:21,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:22,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:22,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:26,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-24 21:44:26,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:44:26,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-09-24 21:44:26,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:26,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:26,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-24 21:44:26,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:26,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:26,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:26,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:26,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:26,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:26,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:44:26,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:26,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:44:26,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:26,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:44:26,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:26,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:26,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:26,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:26,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:26,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 21:44:26,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:44:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:26,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:44:26,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:26,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:26,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:26,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 21:44:26,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:26,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:44:26,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880953800] [2020-09-24 21:44:26,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:26,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:44:26,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24508612] [2020-09-24 21:44:26,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:44:26,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:44:26,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:44:26,688 INFO L87 Difference]: Start difference. First operand 2832 states and 3405 transitions. Second operand 7 states. [2020-09-24 21:44:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:29,332 INFO L93 Difference]: Finished difference Result 7036 states and 8808 transitions. [2020-09-24 21:44:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:44:29,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 199 [2020-09-24 21:44:29,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:29,356 INFO L225 Difference]: With dead ends: 7036 [2020-09-24 21:44:29,356 INFO L226 Difference]: Without dead ends: 4284 [2020-09-24 21:44:29,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:44:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2020-09-24 21:44:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3658. [2020-09-24 21:44:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3658 states. [2020-09-24 21:44:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4430 transitions. [2020-09-24 21:44:29,501 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4430 transitions. Word has length 199 [2020-09-24 21:44:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:29,502 INFO L479 AbstractCegarLoop]: Abstraction has 3658 states and 4430 transitions. [2020-09-24 21:44:29,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:44:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4430 transitions. [2020-09-24 21:44:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 21:44:29,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:29,516 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:44:29,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:29,516 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:29,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1355067259, now seen corresponding path program 1 times [2020-09-24 21:44:29,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:29,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712282612] [2020-09-24 21:44:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:29,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:31,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:31,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:34,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:34,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-09-24 21:44:34,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:44:34,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:44:34,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:44:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:34,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-09-24 21:44:34,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0