/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:23:17,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:23:17,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:23:17,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:23:17,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:23:17,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:23:17,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:23:17,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:23:17,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:23:17,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:23:17,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:23:17,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:23:17,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:23:17,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:23:17,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:23:17,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:23:17,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:23:17,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:23:17,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:23:17,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:23:17,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:23:17,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:23:17,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:23:17,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:23:17,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:23:17,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:23:17,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:23:17,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:23:17,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:23:17,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:23:17,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:23:17,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:23:17,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:23:17,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:23:17,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:23:17,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:23:17,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:23:17,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:23:17,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:23:17,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:23:17,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:23:17,966 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 12:23:18,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:23:18,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:23:18,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:23:18,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:23:18,017 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:23:18,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:23:18,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:23:18,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:23:18,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:23:18,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:23:18,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:23:18,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:23:18,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:23:18,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:23:18,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:23:18,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:23:18,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:23:18,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:23:18,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:23:18,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:23:18,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:23:18,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:23:18,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:23:18,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:23:18,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:23:18,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:23:18,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:23:18,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:23:18,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:23:18,023 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:23:18,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:23:18,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:23:18,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:23:18,540 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:23:18,541 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:23:18,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label10.c [2020-09-25 12:23:18,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026b8c319/47220084d75340b881d0733c4541fae2/FLAG0ee9edf76 [2020-09-25 12:23:19,287 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:23:19,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label10.c [2020-09-25 12:23:19,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026b8c319/47220084d75340b881d0733c4541fae2/FLAG0ee9edf76 [2020-09-25 12:23:19,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/026b8c319/47220084d75340b881d0733c4541fae2 [2020-09-25 12:23:19,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:23:19,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:23:19,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:23:19,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:23:19,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:23:19,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:23:19" (1/1) ... [2020-09-25 12:23:19,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c294ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:19, skipping insertion in model container [2020-09-25 12:23:19,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:23:19" (1/1) ... [2020-09-25 12:23:19,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:23:19,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:23:20,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:23:20,293 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:23:20,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:23:20,409 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:23:20,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20 WrapperNode [2020-09-25 12:23:20,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:23:20,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:23:20,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:23:20,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:23:20,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (1/1) ... [2020-09-25 12:23:20,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:23:20,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:23:20,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:23:20,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:23:20,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (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 12:23:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:23:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:23:20,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 12:23:20,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:23:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 12:23:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:23:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 12:23:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 12:23:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:23:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:23:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:23:21,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:23:21,931 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:23:21,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:23:21 BoogieIcfgContainer [2020-09-25 12:23:21,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:23:21,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:23:21,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:23:21,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:23:21,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:23:19" (1/3) ... [2020-09-25 12:23:21,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710b6d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:23:21, skipping insertion in model container [2020-09-25 12:23:21,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:23:20" (2/3) ... [2020-09-25 12:23:21,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710b6d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:23:21, skipping insertion in model container [2020-09-25 12:23:21,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:23:21" (3/3) ... [2020-09-25 12:23:21,952 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label10.c [2020-09-25 12:23:21,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:23:21,975 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:23:21,998 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:23:22,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:23:22,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:23:22,035 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:23:22,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:23:22,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:23:22,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:23:22,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:23:22,036 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:23:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 12:23:22,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-25 12:23:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:22,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:23:22,097 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2114164186, now seen corresponding path program 1 times [2020-09-25 12:23:22,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:22,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925325945] [2020-09-25 12:23:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:22,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:22,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:22,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:23,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:24,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:27,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:27,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-09-25 12:23:27,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 12:23:27,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-09-25 12:23:27,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:27,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:27,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:23:27,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 12:23:27,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-09-25 12:23:27,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:23:27,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:27,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:27,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:27,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:23:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-25 12:23:27,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:27,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:27,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:23:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:27,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 12:23:27,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:27,737 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 12:23:27,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925325945] [2020-09-25 12:23:27,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:23:27,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 12:23:27,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016963588] [2020-09-25 12:23:27,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 12:23:27,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 12:23:27,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 12:23:27,771 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 12:23:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:29,984 INFO L93 Difference]: Finished difference Result 1206 states and 1652 transitions. [2020-09-25 12:23:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:23:29,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-09-25 12:23:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:30,013 INFO L225 Difference]: With dead ends: 1206 [2020-09-25 12:23:30,013 INFO L226 Difference]: Without dead ends: 628 [2020-09-25 12:23:30,024 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 12:23:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-09-25 12:23:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 615. [2020-09-25 12:23:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-09-25 12:23:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 751 transitions. [2020-09-25 12:23:30,130 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 751 transitions. Word has length 161 [2020-09-25 12:23:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:30,132 INFO L479 AbstractCegarLoop]: Abstraction has 615 states and 751 transitions. [2020-09-25 12:23:30,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 12:23:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 751 transitions. [2020-09-25 12:23:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-25 12:23:30,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:30,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:30,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:23:30,142 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1103327617, now seen corresponding path program 1 times [2020-09-25 12:23:30,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:30,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547090870] [2020-09-25 12:23:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:30,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:30,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-09-25 12:23:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:23:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-09-25 12:23:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:35,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 12:23:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 12:23:35,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-25 12:23:35,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:35,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:35,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:35,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:23:35,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:35,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:23:35,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:35,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:35,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:35,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:35,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:35,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:23:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:35,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:35,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 12:23:35,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:35,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-09-25 12:23:35,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:35,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:23:35,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 12:23:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:23:35,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547090870] [2020-09-25 12:23:35,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:35,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 12:23:35,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861039395] [2020-09-25 12:23:35,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 12:23:35,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 12:23:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:23:35,949 INFO L87 Difference]: Start difference. First operand 615 states and 751 transitions. Second operand 10 states. [2020-09-25 12:23:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:38,830 INFO L93 Difference]: Finished difference Result 1927 states and 2548 transitions. [2020-09-25 12:23:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:23:38,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2020-09-25 12:23:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:38,838 INFO L225 Difference]: With dead ends: 1927 [2020-09-25 12:23:38,839 INFO L226 Difference]: Without dead ends: 887 [2020-09-25 12:23:38,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:23:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2020-09-25 12:23:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 722. [2020-09-25 12:23:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2020-09-25 12:23:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 845 transitions. [2020-09-25 12:23:38,894 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 845 transitions. Word has length 195 [2020-09-25 12:23:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:38,894 INFO L479 AbstractCegarLoop]: Abstraction has 722 states and 845 transitions. [2020-09-25 12:23:38,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 12:23:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 845 transitions. [2020-09-25 12:23:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-25 12:23:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:38,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:38,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:23:38,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:38,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1436833023, now seen corresponding path program 1 times [2020-09-25 12:23:38,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:38,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589447202] [2020-09-25 12:23:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:38,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:39,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:40,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:42,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:42,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:43,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:43,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-09-25 12:23:43,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:23:43,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 12:23:43,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:43,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:43,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 12:23:43,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-09-25 12:23:43,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-25 12:23:43,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:44,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:44,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:44,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:44,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:23:44,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 12:23:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:44,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:44,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:23:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:44,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:44,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 12:23:44,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:44,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-25 12:23:44,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:44,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:44,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:23:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:44,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 12:23:44,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:23:44,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589447202] [2020-09-25 12:23:44,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:44,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 12:23:44,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919583374] [2020-09-25 12:23:44,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 12:23:44,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 12:23:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-09-25 12:23:44,944 INFO L87 Difference]: Start difference. First operand 722 states and 845 transitions. Second operand 16 states. [2020-09-25 12:23:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:48,040 INFO L93 Difference]: Finished difference Result 1359 states and 1617 transitions. [2020-09-25 12:23:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 12:23:48,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 196 [2020-09-25 12:23:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:48,045 INFO L225 Difference]: With dead ends: 1359 [2020-09-25 12:23:48,046 INFO L226 Difference]: Without dead ends: 658 [2020-09-25 12:23:48,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:23:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-09-25 12:23:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 648. [2020-09-25 12:23:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-09-25 12:23:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 709 transitions. [2020-09-25 12:23:48,072 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 709 transitions. Word has length 196 [2020-09-25 12:23:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:48,073 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 709 transitions. [2020-09-25 12:23:48,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 12:23:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 709 transitions. [2020-09-25 12:23:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-09-25 12:23:48,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:48,078 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-09-25 12:23:48,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:23:48,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1002191268, now seen corresponding path program 1 times [2020-09-25 12:23:48,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:48,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606829611] [2020-09-25 12:23:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:48,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:48,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:53,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:53,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 12:23:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-09-25 12:23:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-09-25 12:23:53,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:23:53,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:23:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:53,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:53,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:53,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:23:53,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:53,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 12:23:53,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:53,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:53,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:53,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:53,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:23:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:53,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:53,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 12:23:53,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:53,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 12:23:53,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:53,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:23:53,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:53,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:23:53,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:53,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 12:23:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:53,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:53,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:23:53,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 12:23:53,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:23:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 12:23:53,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:23:53,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:23:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 12:23:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:23:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:23:53,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:23:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-25 12:23:53,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606829611] [2020-09-25 12:23:53,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:23:53,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 12:23:53,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743826957] [2020-09-25 12:23:53,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 12:23:53,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:23:53,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 12:23:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:23:53,873 INFO L87 Difference]: Start difference. First operand 648 states and 709 transitions. Second operand 8 states. [2020-09-25 12:23:56,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:23:56,333 INFO L93 Difference]: Finished difference Result 1533 states and 1687 transitions. [2020-09-25 12:23:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 12:23:56,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 239 [2020-09-25 12:23:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:23:56,339 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 12:23:56,339 INFO L226 Difference]: Without dead ends: 809 [2020-09-25 12:23:56,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-25 12:23:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-09-25 12:23:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 794. [2020-09-25 12:23:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 794 states. [2020-09-25 12:23:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 864 transitions. [2020-09-25 12:23:56,366 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 864 transitions. Word has length 239 [2020-09-25 12:23:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:23:56,366 INFO L479 AbstractCegarLoop]: Abstraction has 794 states and 864 transitions. [2020-09-25 12:23:56,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 12:23:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 864 transitions. [2020-09-25 12:23:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-09-25 12:23:56,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:23:56,371 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:23:56,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:23:56,372 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:23:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:23:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2144981535, now seen corresponding path program 1 times [2020-09-25 12:23:56,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:23:56,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656087095] [2020-09-25 12:23:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:23:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:23:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:56,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:23:59,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:01,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:01,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-09-25 12:24:01,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 12:24:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 12:24:01,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:01,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:24:01,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 12:24:01,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-09-25 12:24:01,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:01,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:24:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:01,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:01,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:01,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:24:01,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:24:01,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:24:01,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:24:01,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 12:24:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:01,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:01,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:02,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:24:02,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 12:24:02,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:24:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 425 [2020-09-25 12:24:02,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:24:02,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:24:02,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:24:02,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 12:24:02,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 12:24:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:24:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:24:02,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656087095] [2020-09-25 12:24:02,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:24:02,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 12:24:02,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254330396] [2020-09-25 12:24:02,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 12:24:02,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:24:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 12:24:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-25 12:24:02,441 INFO L87 Difference]: Start difference. First operand 794 states and 864 transitions. Second operand 13 states. [2020-09-25 12:24:03,017 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-09-25 12:24:03,809 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-09-25 12:24:07,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:24:07,338 INFO L93 Difference]: Finished difference Result 3080 states and 3555 transitions. [2020-09-25 12:24:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 12:24:07,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 245 [2020-09-25 12:24:07,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:24:07,351 INFO L225 Difference]: With dead ends: 3080 [2020-09-25 12:24:07,351 INFO L226 Difference]: Without dead ends: 2308 [2020-09-25 12:24:07,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-09-25 12:24:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2020-09-25 12:24:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2105. [2020-09-25 12:24:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2105 states. [2020-09-25 12:24:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 2323 transitions. [2020-09-25 12:24:07,445 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 2323 transitions. Word has length 245 [2020-09-25 12:24:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:24:07,446 INFO L479 AbstractCegarLoop]: Abstraction has 2105 states and 2323 transitions. [2020-09-25 12:24:07,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 12:24:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 2323 transitions. [2020-09-25 12:24:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-09-25 12:24:07,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:24:07,455 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2020-09-25 12:24:07,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:24:07,455 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:24:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:24:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1722216392, now seen corresponding path program 1 times [2020-09-25 12:24:07,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:24:07,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965634346] [2020-09-25 12:24:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:24:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:24:07,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:07,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:07,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:07,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:24:09,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking...