/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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:07,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:07,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:07,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:07,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:07,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:07,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:07,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:07,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:07,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:07,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:07,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:07,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:07,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:07,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:07,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:07,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:07,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:07,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:07,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:07,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:07,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:07,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:07,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:07,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:07,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:07,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:07,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:07,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:07,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:07,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:07,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:07,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:07,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:07,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:07,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:07,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:07,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:07,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:07,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:07,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:07,449 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 21:41:07,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:07,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:07,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:07,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:07,516 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:07,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:07,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:07,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:07,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:07,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:07,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:07,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:07,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:07,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:07,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:07,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:07,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:07,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:07,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:07,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:07,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:07,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:07,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:07,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:07,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:07,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:07,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:07,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:07,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:07,525 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 21:41:07,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:08,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:08,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:08,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:08,028 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:08,030 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2020-09-24 21:41:08,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ef9b417d/36b63c0c810140db831a13019dc22f29/FLAGa6d511297 [2020-09-24 21:41:08,742 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:08,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2020-09-24 21:41:08,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ef9b417d/36b63c0c810140db831a13019dc22f29/FLAGa6d511297 [2020-09-24 21:41:09,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6ef9b417d/36b63c0c810140db831a13019dc22f29 [2020-09-24 21:41:09,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:09,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:09,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:09,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:09,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:09,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1e87a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09, skipping insertion in model container [2020-09-24 21:41:09,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:09,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:09,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:09,716 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:09,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:09,892 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:09,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09 WrapperNode [2020-09-24 21:41:09,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:09,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:09,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:09,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:09,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:09,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:10,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:10,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (1/1) ... [2020-09-24 21:41:10,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:10,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:10,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:10,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:10,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (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 21:41:10,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:10,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:10,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:10,158 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:10,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:10,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:10,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:11,534 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:11,535 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:11,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:11 BoogieIcfgContainer [2020-09-24 21:41:11,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:11,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:11,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:11,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:11,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:09" (1/3) ... [2020-09-24 21:41:11,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c98ca33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:11, skipping insertion in model container [2020-09-24 21:41:11,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:09" (2/3) ... [2020-09-24 21:41:11,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c98ca33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:11, skipping insertion in model container [2020-09-24 21:41:11,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:11" (3/3) ... [2020-09-24 21:41:11,555 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label08.c [2020-09-24 21:41:11,567 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:11,578 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:11,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:11,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:11,636 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:11,636 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:11,636 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:11,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:11,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:11,637 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:11,637 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:11,668 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-24 21:41:11,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:11,694 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] [2020-09-24 21:41:11,694 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 524055129, now seen corresponding path program 1 times [2020-09-24 21:41:11,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:11,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147236907] [2020-09-24 21:41:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:12,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:12,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:13,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:13,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:14,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:17,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:17,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-24 21:41:17,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:17,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 21:41:17,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:41:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:41:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:41:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:41:17,710 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:41:17,837 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:41:18,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:18,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:18,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:18,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:18,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-24 21:41:18,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:18,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:18,711 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 21:41:18,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147236907] [2020-09-24 21:41:18,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:41:18,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:41:18,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934034663] [2020-09-24 21:41:18,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:41:18,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:18,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:41:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:41:18,749 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:41:19,380 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:41:19,769 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:41:20,139 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:41:20,553 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:41:20,919 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:41:21,423 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:41:22,687 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:41:22,920 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:41:23,260 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-09-24 21:41:24,109 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:41:24,654 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:41:24,891 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-09-24 21:41:25,882 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:41:26,357 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-09-24 21:41:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:29,180 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:41:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:41:29,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2020-09-24 21:41:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:29,215 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:41:29,215 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:41:29,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:41:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:41:29,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:41:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:41:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:41:29,388 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 148 [2020-09-24 21:41:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:29,389 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:41:29,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:41:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:41:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 21:41:29,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:29,406 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] [2020-09-24 21:41:29,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:41:29,406 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:29,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1707252539, now seen corresponding path program 1 times [2020-09-24 21:41:29,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:29,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305506041] [2020-09-24 21:41:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:30,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:34,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:34,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-24 21:41:34,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:34,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:41:34,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:34,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:41:34,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:34,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:41:34,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:34,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:35,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:35,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:41:35,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:35,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:35,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:35,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:35,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:35,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:35,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:35,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:41:35,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:35,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-24 21:41:35,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:35,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:35,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:41:35,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:41:35,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305506041] [2020-09-24 21:41:35,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:35,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:41:35,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155569857] [2020-09-24 21:41:35,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:41:35,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:35,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:41:35,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:41:35,461 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:41:36,705 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:41:36,950 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:41:38,314 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:41:38,590 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:41:40,000 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:41:40,407 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:41:41,723 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:41:42,494 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:41:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:44,535 INFO L93 Difference]: Finished difference Result 4103 states and 5490 transitions. [2020-09-24 21:41:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:41:44,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 170 [2020-09-24 21:41:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:44,558 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:41:44,558 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:41:44,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:41:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:41:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:41:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:41:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3673 transitions. [2020-09-24 21:41:44,713 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3673 transitions. Word has length 170 [2020-09-24 21:41:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:44,714 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3673 transitions. [2020-09-24 21:41:44,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:41:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3673 transitions. [2020-09-24 21:41:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-09-24 21:41:44,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:44,730 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] [2020-09-24 21:41:44,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:44,730 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1511919526, now seen corresponding path program 1 times [2020-09-24 21:41:44,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:44,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872187111] [2020-09-24 21:41:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:45,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:46,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:49,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:49,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-09-24 21:41:49,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:41:49,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-24 21:41:49,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:41:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:41:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:49,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:41:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 21:41:50,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:41:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:50,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:41:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:50,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:50,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:50,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:50,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:41:50,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:50,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:41:50,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:50,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 21:41:50,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:41:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:50,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:50,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:41:50,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:50,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 21:41:50,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:41:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:50,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:41:50,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:41:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:41:50,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872187111] [2020-09-24 21:41:50,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:50,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:41:50,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354419703] [2020-09-24 21:41:50,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:41:50,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:41:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:41:50,435 INFO L87 Difference]: Start difference. First operand 3029 states and 3673 transitions. Second operand 12 states. [2020-09-24 21:41:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:56,577 INFO L93 Difference]: Finished difference Result 8667 states and 11472 transitions. [2020-09-24 21:41:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:41:56,578 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 183 [2020-09-24 21:41:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:56,611 INFO L225 Difference]: With dead ends: 8667 [2020-09-24 21:41:56,611 INFO L226 Difference]: Without dead ends: 5368 [2020-09-24 21:41:56,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:41:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2020-09-24 21:41:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 4728. [2020-09-24 21:41:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4728 states. [2020-09-24 21:41:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 5855 transitions. [2020-09-24 21:41:56,796 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 5855 transitions. Word has length 183 [2020-09-24 21:41:56,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:56,796 INFO L479 AbstractCegarLoop]: Abstraction has 4728 states and 5855 transitions. [2020-09-24 21:41:56,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:41:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 5855 transitions. [2020-09-24 21:41:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-24 21:41:56,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:56,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:41:56,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:56,817 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:56,818 INFO L82 PathProgramCache]: Analyzing trace with hash 452432977, now seen corresponding path program 1 times [2020-09-24 21:41:56,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:56,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217800517] [2020-09-24 21:41:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:56,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:57,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:59,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking...