/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_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:41:55,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:41:55,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:41:55,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:41:55,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:41:55,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:41:55,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:41:55,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:41:55,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:41:55,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:41:55,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:41:55,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:41:55,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:41:55,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:41:55,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:41:55,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:41:55,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:41:55,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:41:55,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:41:55,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:41:55,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:41:55,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:41:55,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:41:55,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:41:55,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:41:55,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:41:55,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:41:55,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:41:55,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:41:55,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:41:55,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:41:55,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:41:55,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:41:55,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:41:55,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:41:55,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:41:55,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:41:55,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:41:55,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:41:55,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:41:55,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:41:55,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:41:55,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:41:55,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:41:55,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:41:55,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:41:55,372 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:41:55,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:41:55,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:41:55,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:41:55,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:41:55,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:41:55,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:41:55,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:41:55,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:41:55,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:41:55,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:41:55,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:41:55,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:41:55,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:41:55,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:41:55,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:41:55,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:41:55,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:55,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:41:55,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:41:55,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:41:55,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:41:55,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:41:55,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:41:55,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:41:55,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:41:55,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:41:55,862 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:41:55,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:41:55,871 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:41:55,872 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:41:55,873 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label19.c [2020-09-24 21:41:55,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c242ac155/23abdb6b3a3c4a97acd93fc825cb2adf/FLAG06c3577ff [2020-09-24 21:41:56,592 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:41:56,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label19.c [2020-09-24 21:41:56,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c242ac155/23abdb6b3a3c4a97acd93fc825cb2adf/FLAG06c3577ff [2020-09-24 21:41:56,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c242ac155/23abdb6b3a3c4a97acd93fc825cb2adf [2020-09-24 21:41:56,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:41:56,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:41:56,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:56,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:41:56,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:41:56,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:56" (1/1) ... [2020-09-24 21:41:56,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee2931e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:56, skipping insertion in model container [2020-09-24 21:41:56,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:41:56" (1/1) ... [2020-09-24 21:41:56,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:41:56,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:41:57,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:57,436 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:41:57,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:41:57,788 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:41:57,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57 WrapperNode [2020-09-24 21:41:57,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:41:57,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:41:57,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:41:57,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:41:57,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... [2020-09-24 21:41:57,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:41:57,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:41:57,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:41:57,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:41:57,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:41:57,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:41:57,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:41:57,974 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:41:57,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:41:57,974 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:41:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:41:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:41:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:41:57,975 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:41:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:41:57,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:41:59,315 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:41:59,315 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:41:59,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:59 BoogieIcfgContainer [2020-09-24 21:41:59,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:41:59,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:41:59,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:41:59,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:41:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:41:56" (1/3) ... [2020-09-24 21:41:59,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c86a072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:59, skipping insertion in model container [2020-09-24 21:41:59,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:41:57" (2/3) ... [2020-09-24 21:41:59,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c86a072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:41:59, skipping insertion in model container [2020-09-24 21:41:59,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:41:59" (3/3) ... [2020-09-24 21:41:59,335 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label19.c [2020-09-24 21:41:59,347 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:41:59,358 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:41:59,381 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:41:59,417 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:41:59,418 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:41:59,418 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:41:59,418 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:41:59,418 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:41:59,418 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:41:59,418 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:41:59,419 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:41:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:41:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-24 21:41:59,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:59,474 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] [2020-09-24 21:41:59,474 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash 405983745, now seen corresponding path program 1 times [2020-09-24 21:41:59,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:59,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484759559] [2020-09-24 21:41:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:00,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:03,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:04,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:04,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-09-24 21:42:04,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:42:04,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 21:42:04,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:42:04,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:42:04,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-09-24 21:42:05,268 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-09-24 21:42:05,512 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2020-09-24 21:42:05,663 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-09-24 21:42:05,821 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-09-24 21:42:05,963 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2020-09-24 21:42:06,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:06,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:06,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:06,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-24 21:42:06,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:06,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:06,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:06,386 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 21:42:06,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484759559] [2020-09-24 21:42:06,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:42:06,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:42:06,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581108287] [2020-09-24 21:42:06,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:42:06,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:42:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:42:06,420 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:42:07,083 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-09-24 21:42:07,362 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-09-24 21:42:07,633 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2020-09-24 21:42:07,929 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-09-24 21:42:08,466 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-09-24 21:42:08,825 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-09-24 21:42:09,351 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-09-24 21:42:10,806 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-09-24 21:42:11,051 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-09-24 21:42:11,422 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:42:12,376 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-09-24 21:42:13,025 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-09-24 21:42:13,253 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-09-24 21:42:14,628 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:42:15,163 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:42:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:18,406 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:42:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:42:18,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-09-24 21:42:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:18,465 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:42:18,465 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:42:18,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:42:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:42:18,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:42:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:42:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:42:18,678 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 118 [2020-09-24 21:42:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:18,679 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:42:18,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:42:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:42:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 21:42:18,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:18,694 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] [2020-09-24 21:42:18,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:42:18,694 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 792482403, now seen corresponding path program 1 times [2020-09-24 21:42:18,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:18,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871366995] [2020-09-24 21:42:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:18,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:20,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:22,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:22,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:23,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:23,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-09-24 21:42:23,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:42:23,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:42:23,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:42:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:42:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:42:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:24,521 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-09-24 21:42:24,719 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-09-24 21:42:24,996 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 44 [2020-09-24 21:42:25,234 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 40 [2020-09-24 21:42:25,477 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 36 [2020-09-24 21:42:25,653 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 31 [2020-09-24 21:42:25,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:25,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:25,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:25,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:25,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:25,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:42:25,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:42:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:25,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:25,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:25,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:25,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:42:25,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:25,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 21:42:25,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:25,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:42:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:25,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:42:25,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:42:26,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871366995] [2020-09-24 21:42:26,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:26,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:42:26,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556602943] [2020-09-24 21:42:26,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:42:26,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:26,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:42:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:42:26,273 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:42:27,224 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-09-24 21:42:27,597 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2020-09-24 21:42:28,254 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 100 [2020-09-24 21:42:28,671 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-09-24 21:42:29,646 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-09-24 21:42:30,163 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-09-24 21:42:30,652 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-09-24 21:42:31,050 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 94 [2020-09-24 21:42:32,035 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:42:32,834 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-09-24 21:42:33,361 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 89 [2020-09-24 21:42:34,347 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2020-09-24 21:42:35,023 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-09-24 21:42:35,508 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-09-24 21:42:36,042 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-09-24 21:42:38,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:42:38,314 INFO L93 Difference]: Finished difference Result 4105 states and 5485 transitions. [2020-09-24 21:42:38,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:42:38,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 140 [2020-09-24 21:42:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:42:38,336 INFO L225 Difference]: With dead ends: 4105 [2020-09-24 21:42:38,336 INFO L226 Difference]: Without dead ends: 3109 [2020-09-24 21:42:38,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:42:38,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2020-09-24 21:42:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 3029. [2020-09-24 21:42:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:42:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3674 transitions. [2020-09-24 21:42:38,450 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3674 transitions. Word has length 140 [2020-09-24 21:42:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:42:38,450 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3674 transitions. [2020-09-24 21:42:38,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:42:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3674 transitions. [2020-09-24 21:42:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-24 21:42:38,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:38,458 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] [2020-09-24 21:42:38,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:42:38,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1433781262, now seen corresponding path program 1 times [2020-09-24 21:42:38,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:38,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287257058] [2020-09-24 21:42:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:38,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:38,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:38,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:38,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:39,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:40,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:42,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:43,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-09-24 21:42:43,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:42:43,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:42:43,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:42:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:42:43,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:42:43,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:43,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:43,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:43,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:43,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 21:42:43,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:43,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:43,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:43,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:42:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:43,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:43,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:42:43,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:43,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:42:43,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:42:43,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:43,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:42:43,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:42:44,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:42:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:44,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:44,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:44,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:44,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:42:44,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:42:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 21:42:44,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:44,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:42:44,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:42:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:42:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:42:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287257058] [2020-09-24 21:42:44,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:42:44,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:42:44,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979369657] [2020-09-24 21:42:44,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:42:44,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:44,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:42:44,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:42:44,491 INFO L87 Difference]: Start difference. First operand 3029 states and 3674 transitions. Second operand 13 states. [2020-09-24 21:42:45,405 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-09-24 21:42:45,690 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-09-24 21:42:46,260 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-09-24 21:42:46,418 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-09-24 21:42:48,780 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62