/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:29:01,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:29:01,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:29:01,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:29:01,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:29:01,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:29:01,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:29:01,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:29:01,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:29:01,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:29:01,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:29:01,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:29:01,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:29:01,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:29:01,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:29:01,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:29:01,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:29:01,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:29:01,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:29:01,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:29:01,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:29:01,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:29:01,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:29:01,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:29:01,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:29:01,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:29:01,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:29:01,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:29:01,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:29:01,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:29:01,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:29:02,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:29:02,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:29:02,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:29:02,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:29:02,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:29:02,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:29:02,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:29:02,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:29:02,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:29:02,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:29:02,010 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 [2020-09-25 04:29:02,068 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:29:02,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:29:02,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:29:02,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:29:02,071 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:29:02,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:29:02,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:29:02,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:29:02,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:29:02,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:29:02,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:29:02,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:29:02,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:29:02,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:29:02,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:29:02,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:29:02,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:29:02,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:29:02,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:29:02,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:29:02,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:29:02,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:29:02,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:29:02,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:29:02,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:29:02,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:29:02,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:29:02,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:29:02,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:29:02,078 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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-09-25 04:29:02,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:29:02,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:29:02,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:29:02,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:29:02,608 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:29:02,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-25 04:29:02,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e983d285/330bd3dd5b294a20b0fde3b6c634811b/FLAG29293f1d3 [2020-09-25 04:29:03,329 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:29:03,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label56.c [2020-09-25 04:29:03,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e983d285/330bd3dd5b294a20b0fde3b6c634811b/FLAG29293f1d3 [2020-09-25 04:29:03,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e983d285/330bd3dd5b294a20b0fde3b6c634811b [2020-09-25 04:29:03,587 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:29:03,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:29:03,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:29:03,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:29:03,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:29:03,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:29:03" (1/1) ... [2020-09-25 04:29:03,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fb128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:03, skipping insertion in model container [2020-09-25 04:29:03,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:29:03" (1/1) ... [2020-09-25 04:29:03,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:29:03,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:29:04,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:29:04,159 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:29:04,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:29:04,384 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:29:04,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04 WrapperNode [2020-09-25 04:29:04,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:29:04,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:29:04,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:29:04,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:29:04,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (1/1) ... [2020-09-25 04:29:04,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:29:04,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:29:04,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:29:04,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:29:04,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (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 [2020-09-25 04:29:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:29:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:29:04,597 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 04:29:04,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:29:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 04:29:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:29:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:29:04,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 04:29:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:29:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:29:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:29:05,932 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:29:05,932 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 04:29:05,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:29:05 BoogieIcfgContainer [2020-09-25 04:29:05,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:29:05,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:29:05,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:29:05,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:29:05,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:29:03" (1/3) ... [2020-09-25 04:29:05,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:29:05, skipping insertion in model container [2020-09-25 04:29:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:29:04" (2/3) ... [2020-09-25 04:29:05,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e43b5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:29:05, skipping insertion in model container [2020-09-25 04:29:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:29:05" (3/3) ... [2020-09-25 04:29:05,952 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label56.c [2020-09-25 04:29:05,965 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:29:05,977 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:29:06,002 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:29:06,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:29:06,039 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:29:06,039 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:29:06,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:29:06,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:29:06,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:29:06,040 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:29:06,040 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:29:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 04:29:06,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 04:29:06,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:06,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:06,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash -934155158, now seen corresponding path program 1 times [2020-09-25 04:29:06,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:06,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901706296] [2020-09-25 04:29:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:06,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:06,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:07,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:09,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:10,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:11,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:11,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:11,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 04:29:11,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:29:11,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-25 04:29:11,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:11,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:11,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:29:11,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:29:11,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-25 04:29:11,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-09-25 04:29:11,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:11,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:11,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:11,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:11,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:11,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 04:29:11,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:11,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:11,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:11,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:11,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 04:29:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:29:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:29:11,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901706296] [2020-09-25 04:29:11,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:29:11,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:29:11,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482559361] [2020-09-25 04:29:11,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:29:11,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:29:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:29:11,969 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 04:29:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:14,441 INFO L93 Difference]: Finished difference Result 1247 states and 1695 transitions. [2020-09-25 04:29:14,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 04:29:14,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2020-09-25 04:29:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:14,483 INFO L225 Difference]: With dead ends: 1247 [2020-09-25 04:29:14,484 INFO L226 Difference]: Without dead ends: 669 [2020-09-25 04:29:14,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:29:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-09-25 04:29:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 621. [2020-09-25 04:29:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 04:29:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 04:29:14,598 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 149 [2020-09-25 04:29:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:14,599 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 04:29:14,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:29:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 04:29:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-25 04:29:14,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:14,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:14,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:29:14,608 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1111409233, now seen corresponding path program 1 times [2020-09-25 04:29:14,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:14,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819888260] [2020-09-25 04:29:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:14,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:14,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:15,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:16,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:19,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:19,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-09-25 04:29:19,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:29:19,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 04:29:19,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:19,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 04:29:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-09-25 04:29:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:19,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:19,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:19,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:19,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:19,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:19,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:29:19,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:19,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:19,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:19,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:19,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:29:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:19,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:19,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:19,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:29:19,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:19,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-25 04:29:19,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:19,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:19,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:19,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:19,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 04:29:19,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:29:19,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819888260] [2020-09-25 04:29:19,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:29:19,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:29:19,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667388480] [2020-09-25 04:29:19,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:29:19,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:29:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:29:19,998 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 04:29:21,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:21,968 INFO L93 Difference]: Finished difference Result 1531 states and 1847 transitions. [2020-09-25 04:29:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:29:21,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-09-25 04:29:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:21,976 INFO L225 Difference]: With dead ends: 1531 [2020-09-25 04:29:21,976 INFO L226 Difference]: Without dead ends: 932 [2020-09-25 04:29:21,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:29:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2020-09-25 04:29:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 922. [2020-09-25 04:29:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 922 states. [2020-09-25 04:29:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1103 transitions. [2020-09-25 04:29:22,023 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1103 transitions. Word has length 166 [2020-09-25 04:29:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:22,024 INFO L479 AbstractCegarLoop]: Abstraction has 922 states and 1103 transitions. [2020-09-25 04:29:22,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:29:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1103 transitions. [2020-09-25 04:29:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-25 04:29:22,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:22,029 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:22,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:29:22,030 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash -375129923, now seen corresponding path program 1 times [2020-09-25 04:29:22,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:22,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466181388] [2020-09-25 04:29:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:22,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:22,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:24,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:25,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:26,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:27,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:27,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-09-25 04:29:27,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 04:29:27,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 04:29:27,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:27,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 04:29:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 04:29:27,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:27,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:27,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:27,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:27,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:29:27,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:27,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:27,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:27,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:27,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:29:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:27,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:27,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:27,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:29:27,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:27,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 04:29:27,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:27,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:27,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:27,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 04:29:27,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 04:29:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:27,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:27,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 04:29:27,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 04:29:27,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:27,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:27,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:29:27,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 04:29:27,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:29:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:29:27,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466181388] [2020-09-25 04:29:27,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:29:27,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:29:27,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618962718] [2020-09-25 04:29:27,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:29:27,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:27,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:29:27,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:29:27,329 INFO L87 Difference]: Start difference. First operand 922 states and 1103 transitions. Second operand 7 states. [2020-09-25 04:29:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:29,901 INFO L93 Difference]: Finished difference Result 2200 states and 2789 transitions. [2020-09-25 04:29:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:29:29,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2020-09-25 04:29:29,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:29,915 INFO L225 Difference]: With dead ends: 2200 [2020-09-25 04:29:29,916 INFO L226 Difference]: Without dead ends: 1300 [2020-09-25 04:29:29,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:29:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2020-09-25 04:29:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1243. [2020-09-25 04:29:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-09-25 04:29:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1474 transitions. [2020-09-25 04:29:29,972 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1474 transitions. Word has length 184 [2020-09-25 04:29:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:29,973 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1474 transitions. [2020-09-25 04:29:29,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:29:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1474 transitions. [2020-09-25 04:29:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 04:29:29,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:29,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:29,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:29:29,980 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 817645172, now seen corresponding path program 1 times [2020-09-25 04:29:29,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:29,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727202979] [2020-09-25 04:29:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:33,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:33,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:35,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:35,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-09-25 04:29:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:29:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-25 04:29:35,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:35,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-25 04:29:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 04:29:35,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:35,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:35,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:35,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:35,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:35,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 04:29:35,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:35,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:35,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:35,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:35,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:29:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:35,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:35,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:35,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:29:35,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:35,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 04:29:35,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:35,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:35,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:35,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:35,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 04:29:35,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:35,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 04:29:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:35,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:35,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 04:29:35,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:35,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-25 04:29:35,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:35,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 04:29:35,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 04:29:35,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:29:35,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727202979] [2020-09-25 04:29:35,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:29:35,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 04:29:35,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061762511] [2020-09-25 04:29:35,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 04:29:35,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 04:29:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:29:35,313 INFO L87 Difference]: Start difference. First operand 1243 states and 1474 transitions. Second operand 7 states. [2020-09-25 04:29:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:37,797 INFO L93 Difference]: Finished difference Result 2824 states and 3483 transitions. [2020-09-25 04:29:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 04:29:37,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 189 [2020-09-25 04:29:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:37,809 INFO L225 Difference]: With dead ends: 2824 [2020-09-25 04:29:37,810 INFO L226 Difference]: Without dead ends: 1603 [2020-09-25 04:29:37,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-25 04:29:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-09-25 04:29:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1571. [2020-09-25 04:29:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1571 states. [2020-09-25 04:29:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 1860 transitions. [2020-09-25 04:29:37,891 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 1860 transitions. Word has length 189 [2020-09-25 04:29:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:37,892 INFO L479 AbstractCegarLoop]: Abstraction has 1571 states and 1860 transitions. [2020-09-25 04:29:37,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 04:29:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 1860 transitions. [2020-09-25 04:29:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-25 04:29:37,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:37,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:37,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:29:37,902 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:37,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:37,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1713485497, now seen corresponding path program 1 times [2020-09-25 04:29:37,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:37,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969488244] [2020-09-25 04:29:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:37,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:38,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:38,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:40,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:40,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:42,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:42,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:42,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-09-25 04:29:42,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:29:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 04:29:42,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:42,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:42,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-09-25 04:29:42,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 04:29:42,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:43,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:43,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:43,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:43,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:43,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:29:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:43,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:29:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:29:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:43,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:43,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 04:29:43,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-25 04:29:43,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:43,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:43,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 04:29:43,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:29:43,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969488244] [2020-09-25 04:29:43,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:29:43,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:29:43,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549455499] [2020-09-25 04:29:43,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:29:43,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:29:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:29:43,277 INFO L87 Difference]: Start difference. First operand 1571 states and 1860 transitions. Second operand 5 states. [2020-09-25 04:29:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:45,187 INFO L93 Difference]: Finished difference Result 4208 states and 5166 transitions. [2020-09-25 04:29:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:29:45,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2020-09-25 04:29:45,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:45,199 INFO L225 Difference]: With dead ends: 4208 [2020-09-25 04:29:45,200 INFO L226 Difference]: Without dead ends: 2282 [2020-09-25 04:29:45,207 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 [2020-09-25 04:29:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-09-25 04:29:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2267. [2020-09-25 04:29:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2267 states. [2020-09-25 04:29:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 2629 transitions. [2020-09-25 04:29:45,273 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 2629 transitions. Word has length 191 [2020-09-25 04:29:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:45,273 INFO L479 AbstractCegarLoop]: Abstraction has 2267 states and 2629 transitions. [2020-09-25 04:29:45,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:29:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 2629 transitions. [2020-09-25 04:29:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-25 04:29:45,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:45,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:29:45,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:29:45,283 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1421897619, now seen corresponding path program 1 times [2020-09-25 04:29:45,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:45,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346002705] [2020-09-25 04:29:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:45,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:45,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:45,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:50,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:50,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 04:29:50,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 04:29:50,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-25 04:29:50,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:50,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:29:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-09-25 04:29:50,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 04:29:50,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:29:50,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:29:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:50,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:50,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 04:29:50,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:50,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 04:29:50,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:50,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:50,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:50,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:50,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:50,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 04:29:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:50,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:50,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:50,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 04:29:50,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:50,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:29:50,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:50,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:50,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:29:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:29:50,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-25 04:29:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:50,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:50,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:29:50,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 04:29:50,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:29:50,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 04:29:50,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:29:50,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:29:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:29:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:29:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 04:29:50,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:29:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-25 04:29:50,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346002705] [2020-09-25 04:29:50,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:29:50,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 04:29:50,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099785065] [2020-09-25 04:29:50,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:29:50,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:29:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:29:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:29:50,674 INFO L87 Difference]: Start difference. First operand 2267 states and 2629 transitions. Second operand 5 states. [2020-09-25 04:29:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:29:52,392 INFO L93 Difference]: Finished difference Result 5440 states and 6466 transitions. [2020-09-25 04:29:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:29:52,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 205 [2020-09-25 04:29:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:29:52,403 INFO L225 Difference]: With dead ends: 5440 [2020-09-25 04:29:52,403 INFO L226 Difference]: Without dead ends: 1910 [2020-09-25 04:29:52,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 04:29:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2020-09-25 04:29:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1896. [2020-09-25 04:29:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-09-25 04:29:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2164 transitions. [2020-09-25 04:29:52,462 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2164 transitions. Word has length 205 [2020-09-25 04:29:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:29:52,463 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2164 transitions. [2020-09-25 04:29:52,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:29:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2164 transitions. [2020-09-25 04:29:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-09-25 04:29:52,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:29:52,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 04:29:52,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:29:52,472 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:29:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:29:52,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1290106335, now seen corresponding path program 1 times [2020-09-25 04:29:52,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:29:52,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357719943] [2020-09-25 04:29:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:29:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:29:52,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:29:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking...