/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:43,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:43,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:43,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:43,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:43,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:43,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:43,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:43,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:43,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:43,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:43,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:43,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:43,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:43,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:43,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:43,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:43,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:43,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:43,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:43,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:43,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:43,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:43,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:43,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:43,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:43,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:43,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:43,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:43,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:43,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:43,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:43,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:43,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:43,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:43,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:43,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:43,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:43,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:43,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:43,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:43,734 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 21:39:43,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:43,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:43,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:43,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:43,763 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:43,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:43,764 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:43,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:43,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:43,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:43,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:43,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:43,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:43,765 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:43,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:43,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:43,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:43,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:43,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:43,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:43,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:43,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:43,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:43,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:43,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:43,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:43,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:43,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:43,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:43,769 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 21:39:44,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:44,271 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:44,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:44,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:44,280 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:44,281 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-24 21:39:44,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be506936/da7663b325d4439a8bff22af312ea251/FLAG97339e3ac [2020-09-24 21:39:45,071 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:45,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2020-09-24 21:39:45,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be506936/da7663b325d4439a8bff22af312ea251/FLAG97339e3ac [2020-09-24 21:39:45,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7be506936/da7663b325d4439a8bff22af312ea251 [2020-09-24 21:39:45,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:45,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:45,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:45,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:45,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:45,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:45" (1/1) ... [2020-09-24 21:39:45,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:45, skipping insertion in model container [2020-09-24 21:39:45,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:45" (1/1) ... [2020-09-24 21:39:45,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:45,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:46,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:46,037 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:46,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:46,287 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:46,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46 WrapperNode [2020-09-24 21:39:46,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:46,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:46,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:46,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:46,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (1/1) ... [2020-09-24 21:39:46,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:46,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:46,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:46,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:46,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (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 21:39:46,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:46,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:46,470 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:46,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:46,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:46,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:47,821 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:47,822 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:47,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:47 BoogieIcfgContainer [2020-09-24 21:39:47,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:47,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:47,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:47,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:47,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:45" (1/3) ... [2020-09-24 21:39:47,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62dccd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:47, skipping insertion in model container [2020-09-24 21:39:47,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:46" (2/3) ... [2020-09-24 21:39:47,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62dccd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:47, skipping insertion in model container [2020-09-24 21:39:47,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:47" (3/3) ... [2020-09-24 21:39:47,841 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label35.c [2020-09-24 21:39:47,854 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:47,867 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:47,890 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:47,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:47,932 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:47,932 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:47,932 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:47,933 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:47,933 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:47,933 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:47,933 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-24 21:39:47,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:47,998 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] [2020-09-24 21:39:47,998 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash -850053121, now seen corresponding path program 1 times [2020-09-24 21:39:48,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:48,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224267661] [2020-09-24 21:39:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:48,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:49,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:50,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:51,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:53,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:53,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-24 21:39:53,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:39:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:39:53,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:53,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:53,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:39:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:53,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:54,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:54,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:54,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:54,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-24 21:39:54,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:54,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:54,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:54,374 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 21:39:54,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224267661] [2020-09-24 21:39:54,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:54,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:54,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560234293] [2020-09-24 21:39:54,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:54,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:54,404 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:55,243 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:39:55,573 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:39:56,069 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:39:57,015 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 21:39:57,500 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:40:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:01,349 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:40:01,351 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 108 [2020-09-24 21:40:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:01,380 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:01,381 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:01,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:40:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1150 transitions. [2020-09-24 21:40:01,565 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1150 transitions. Word has length 108 [2020-09-24 21:40:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:01,566 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1150 transitions. [2020-09-24 21:40:01,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1150 transitions. [2020-09-24 21:40:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-09-24 21:40:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:01,576 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:01,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:01,576 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash -266300772, now seen corresponding path program 1 times [2020-09-24 21:40:01,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:01,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539004789] [2020-09-24 21:40:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:06,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:06,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-09-24 21:40:06,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:40:06,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:40:06,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:06,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:40:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:06,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:06,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:07,277 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-09-24 21:40:07,403 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-09-24 21:40:07,531 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-09-24 21:40:07,660 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-09-24 21:40:07,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:08,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:08,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:08,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:08,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 21:40:08,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:08,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:08,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:08,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:08,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:08,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:08,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:08,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:08,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 21:40:08,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:08,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:08,606 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-09-24 21:40:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:08,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539004789] [2020-09-24 21:40:08,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:08,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:40:08,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144697499] [2020-09-24 21:40:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:40:08,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:40:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:40:08,804 INFO L87 Difference]: Start difference. First operand 985 states and 1150 transitions. Second operand 21 states. [2020-09-24 21:40:09,717 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-09-24 21:40:10,092 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 102 [2020-09-24 21:40:11,069 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2020-09-24 21:40:11,396 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2020-09-24 21:40:12,300 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-09-24 21:40:13,209 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 96 [2020-09-24 21:40:13,767 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 93 [2020-09-24 21:40:14,293 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-09-24 21:40:14,833 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-09-24 21:40:15,250 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 90 [2020-09-24 21:40:15,620 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 85 [2020-09-24 21:40:15,915 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-09-24 21:40:16,277 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-09-24 21:40:16,587 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2020-09-24 21:40:16,915 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2020-09-24 21:40:18,117 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2020-09-24 21:40:18,632 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-09-24 21:40:19,097 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-09-24 21:40:19,383 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 81 [2020-09-24 21:40:19,649 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-09-24 21:40:20,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:20,886 INFO L93 Difference]: Finished difference Result 2265 states and 2660 transitions. [2020-09-24 21:40:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:40:20,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-09-24 21:40:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:20,901 INFO L225 Difference]: With dead ends: 2265 [2020-09-24 21:40:20,902 INFO L226 Difference]: Without dead ends: 1368 [2020-09-24 21:40:20,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=719, Invalid=1831, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:40:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2020-09-24 21:40:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1212. [2020-09-24 21:40:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1212 states. [2020-09-24 21:40:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1411 transitions. [2020-09-24 21:40:20,971 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1411 transitions. Word has length 125 [2020-09-24 21:40:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:20,974 INFO L479 AbstractCegarLoop]: Abstraction has 1212 states and 1411 transitions. [2020-09-24 21:40:20,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:40:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1411 transitions. [2020-09-24 21:40:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 21:40:20,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:20,979 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:20,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:20,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 626429774, now seen corresponding path program 1 times [2020-09-24 21:40:20,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:20,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11336117] [2020-09-24 21:40:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:21,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:21,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 21:40:21,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-24 21:40:21,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-24 21:40:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-09-24 21:40:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:21,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:21,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:21,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:21,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:21,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:40:21,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:21,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:40:21,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:40:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:21,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:21,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:21,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:21,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:21,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 21:40:21,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:21,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:21,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:40:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:40:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:21,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11336117] [2020-09-24 21:40:21,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:21,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:40:21,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688950367] [2020-09-24 21:40:21,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:40:21,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:40:21,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:40:21,597 INFO L87 Difference]: Start difference. First operand 1212 states and 1411 transitions. Second operand 5 states. [2020-09-24 21:40:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:23,152 INFO L93 Difference]: Finished difference Result 2650 states and 3180 transitions. [2020-09-24 21:40:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:40:23,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-09-24 21:40:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:23,167 INFO L225 Difference]: With dead ends: 2650 [2020-09-24 21:40:23,167 INFO L226 Difference]: Without dead ends: 1526 [2020-09-24 21:40:23,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:40:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-09-24 21:40:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1500. [2020-09-24 21:40:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2020-09-24 21:40:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1761 transitions. [2020-09-24 21:40:23,232 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1761 transitions. Word has length 129 [2020-09-24 21:40:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:23,234 INFO L479 AbstractCegarLoop]: Abstraction has 1500 states and 1761 transitions. [2020-09-24 21:40:23,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:40:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1761 transitions. [2020-09-24 21:40:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 21:40:23,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:23,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:40:23,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:23,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:23,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1390084124, now seen corresponding path program 1 times [2020-09-24 21:40:23,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:23,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178526647] [2020-09-24 21:40:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:28,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:40:28,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:40:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-24 21:40:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:40:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 21:40:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:28,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:28,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:28,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:28,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:40:28,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:28,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:28,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:28,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:40:28,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:28,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:28,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:28,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:28,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:28,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 21:40:28,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:28,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:28,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:28,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:28,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:40:28,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:28,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:40:28,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:28,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:28,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:28,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:40:28,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:28,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178526647] [2020-09-24 21:40:28,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:28,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:40:28,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118630490] [2020-09-24 21:40:28,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:40:28,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:40:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:40:28,794 INFO L87 Difference]: Start difference. First operand 1500 states and 1761 transitions. Second operand 10 states. [2020-09-24 21:40:29,127 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-09-24 21:40:30,403 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-09-24 21:40:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:33,101 INFO L93 Difference]: Finished difference Result 3622 states and 4332 transitions. [2020-09-24 21:40:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:40:33,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 151 [2020-09-24 21:40:33,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:33,119 INFO L225 Difference]: With dead ends: 3622 [2020-09-24 21:40:33,119 INFO L226 Difference]: Without dead ends: 2210 [2020-09-24 21:40:33,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:40:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2020-09-24 21:40:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 2108. [2020-09-24 21:40:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2108 states. [2020-09-24 21:40:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2445 transitions. [2020-09-24 21:40:33,203 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2445 transitions. Word has length 151 [2020-09-24 21:40:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:33,203 INFO L479 AbstractCegarLoop]: Abstraction has 2108 states and 2445 transitions. [2020-09-24 21:40:33,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:40:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2445 transitions. [2020-09-24 21:40:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-09-24 21:40:33,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:33,211 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-24 21:40:33,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:40:33,212 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -247402504, now seen corresponding path program 1 times [2020-09-24 21:40:33,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:33,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888313870] [2020-09-24 21:40:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:33,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking...