/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:49,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:49,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:49,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:49,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:49,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:49,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:49,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:49,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:49,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:49,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:49,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:49,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:49,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:49,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:49,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:49,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:49,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:49,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:49,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:49,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:49,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:49,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:49,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:49,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:49,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:49,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:49,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:49,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:49,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:49,318 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:49,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:49,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:49,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:49,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:49,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:49,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:49,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:49,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:49,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:49,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:49,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:43:49,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:49,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:49,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:49,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:49,378 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:49,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:49,379 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:49,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:49,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:49,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:49,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:49,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:49,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:49,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:49,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:49,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:49,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:49,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:49,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:49,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:49,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:49,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:49,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:49,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:49,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:49,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:49,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:49,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:49,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:49,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:43:49,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:49,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:49,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:49,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:49,863 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:49,864 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2020-09-24 21:43:49,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bcb7182/57a198675aad495fb9299dbb45a33610/FLAG86aa68174 [2020-09-24 21:43:50,638 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:50,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label55.c [2020-09-24 21:43:50,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bcb7182/57a198675aad495fb9299dbb45a33610/FLAG86aa68174 [2020-09-24 21:43:50,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bcb7182/57a198675aad495fb9299dbb45a33610 [2020-09-24 21:43:50,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:50,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:50,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:50,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:50,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:50,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:50" (1/1) ... [2020-09-24 21:43:50,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d876c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:50, skipping insertion in model container [2020-09-24 21:43:50,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:50" (1/1) ... [2020-09-24 21:43:50,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:50,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:51,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:51,446 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:51,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:51,676 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:51,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51 WrapperNode [2020-09-24 21:43:51,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:51,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:51,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:51,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:51,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... [2020-09-24 21:43:51,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:51,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:51,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:51,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:51,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:51,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:51,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:51,899 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:51,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:51,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:53,246 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:53,246 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:53,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:53 BoogieIcfgContainer [2020-09-24 21:43:53,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:53,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:53,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:53,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:53,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:50" (1/3) ... [2020-09-24 21:43:53,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:53, skipping insertion in model container [2020-09-24 21:43:53,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:51" (2/3) ... [2020-09-24 21:43:53,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb4822a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:53, skipping insertion in model container [2020-09-24 21:43:53,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:53" (3/3) ... [2020-09-24 21:43:53,268 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label55.c [2020-09-24 21:43:53,280 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:53,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:53,317 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:53,359 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:53,359 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:53,360 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:53,360 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:53,360 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:53,360 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:53,360 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:53,361 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-24 21:43:53,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:53,417 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] [2020-09-24 21:43:53,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:53,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1120036286, now seen corresponding path program 1 times [2020-09-24 21:43:53,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:53,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087928403] [2020-09-24 21:43:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:53,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:54,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:56,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:57,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:58,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:58,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-09-24 21:43:58,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:43:58,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:43:58,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:58,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:58,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:59,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:59,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:59,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:59,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:59,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 21:43:59,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:59,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:59,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:59,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087928403] [2020-09-24 21:43:59,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:59,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:59,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539799685] [2020-09-24 21:43:59,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:59,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:59,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:59,785 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:44:00,582 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-24 21:44:00,810 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-09-24 21:44:01,156 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-09-24 21:44:01,471 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-09-24 21:44:01,873 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-24 21:44:02,943 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-09-24 21:44:03,098 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-09-24 21:44:03,345 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:44:04,152 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-09-24 21:44:04,635 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-09-24 21:44:04,853 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:44:05,824 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:44:06,242 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:44:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:08,666 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:44:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:44:08,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 131 [2020-09-24 21:44:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:08,700 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:44:08,701 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:44:08,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:44:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:44:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:44:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:44:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:44:08,868 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 131 [2020-09-24 21:44:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:08,869 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:44:08,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:44:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:44:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 21:44:08,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:08,881 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:44:08,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:44:08,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2022394144, now seen corresponding path program 1 times [2020-09-24 21:44:08,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:08,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602809101] [2020-09-24 21:44:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:08,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:09,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:12,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:12,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:12,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:13,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:44:13,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:44:13,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:44:13,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:13,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:44:13,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:44:13,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:44:13,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:14,521 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:44:14,660 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-09-24 21:44:14,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:14,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:15,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:15,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:15,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 21:44:15,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:44:15,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:15,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:15,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:15,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:15,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:15,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:44:15,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:15,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 21:44:15,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:15,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:44:15,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:15,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:44:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:44:15,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602809101] [2020-09-24 21:44:15,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:15,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:44:15,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521485044] [2020-09-24 21:44:15,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:44:15,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:44:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:44:15,851 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:44:16,646 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:44:17,156 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-09-24 21:44:17,467 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-09-24 21:44:17,673 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-09-24 21:44:18,176 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-09-24 21:44:18,526 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-09-24 21:44:18,891 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:44:19,039 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-09-24 21:44:19,336 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-24 21:44:19,670 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-09-24 21:44:20,574 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-09-24 21:44:21,273 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-09-24 21:44:21,753 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:44:22,644 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-09-24 21:44:23,368 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-09-24 21:44:23,858 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-09-24 21:44:24,297 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-09-24 21:44:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:26,204 INFO L93 Difference]: Finished difference Result 4063 states and 5402 transitions. [2020-09-24 21:44:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:44:26,205 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 153 [2020-09-24 21:44:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:26,230 INFO L225 Difference]: With dead ends: 4063 [2020-09-24 21:44:26,231 INFO L226 Difference]: Without dead ends: 3067 [2020-09-24 21:44:26,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:44:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2020-09-24 21:44:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2844. [2020-09-24 21:44:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2020-09-24 21:44:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 3417 transitions. [2020-09-24 21:44:26,387 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 3417 transitions. Word has length 153 [2020-09-24 21:44:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:26,387 INFO L479 AbstractCegarLoop]: Abstraction has 2844 states and 3417 transitions. [2020-09-24 21:44:26,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:44:26,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 3417 transitions. [2020-09-24 21:44:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-24 21:44:26,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:26,402 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] [2020-09-24 21:44:26,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:44:26,403 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:26,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:26,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1139333803, now seen corresponding path program 1 times [2020-09-24 21:44:26,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:26,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698827574] [2020-09-24 21:44:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:26,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:27,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:28,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:29,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:29,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:30,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:31,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:31,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:31,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-09-24 21:44:31,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 21:44:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-09-24 21:44:31,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:31,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:31,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:44:31,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:32,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:32,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 21:44:32,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:32,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:32,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:32,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:32,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-24 21:44:32,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:32,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:32,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:32,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:32,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-24 21:44:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:32,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:32,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:32,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:32,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:44:32,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:32,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:44:32,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698827574] [2020-09-24 21:44:32,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:32,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:44:32,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876424584] [2020-09-24 21:44:32,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:44:32,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:32,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:44:32,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:44:32,516 INFO L87 Difference]: Start difference. First operand 2844 states and 3417 transitions. Second operand 12 states. [2020-09-24 21:44:33,239 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-09-24 21:44:33,523 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-09-24 21:44:34,026 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-09-24 21:44:36,043 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-09-24 21:44:39,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:39,006 INFO L93 Difference]: Finished difference Result 8522 states and 11299 transitions. [2020-09-24 21:44:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:44:39,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 166 [2020-09-24 21:44:39,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:39,046 INFO L225 Difference]: With dead ends: 8522 [2020-09-24 21:44:39,047 INFO L226 Difference]: Without dead ends: 5408 [2020-09-24 21:44:39,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:44:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5408 states. [2020-09-24 21:44:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5408 to 4768. [2020-09-24 21:44:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4768 states. [2020-09-24 21:44:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4768 states to 4768 states and 5914 transitions. [2020-09-24 21:44:39,256 INFO L78 Accepts]: Start accepts. Automaton has 4768 states and 5914 transitions. Word has length 166 [2020-09-24 21:44:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:39,257 INFO L479 AbstractCegarLoop]: Abstraction has 4768 states and 5914 transitions. [2020-09-24 21:44:39,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:44:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4768 states and 5914 transitions. [2020-09-24 21:44:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-09-24 21:44:39,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:39,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 21:44:39,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:39,276 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1003736365, now seen corresponding path program 1 times [2020-09-24 21:44:39,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:39,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080871426] [2020-09-24 21:44:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:39,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking...