/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:31,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:31,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:31,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:31,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:31,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:31,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:31,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:31,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:31,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:31,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:31,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:31,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:31,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:31,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:31,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:31,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:31,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:31,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:31,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:31,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:31,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:31,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:31,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:31,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:31,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:31,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:31,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:31,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:31,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:31,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:31,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:31,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:31,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:31,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:31,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:31,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:31,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:31,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:31,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:31,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:31,391 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 [2020-10-13 10:51:31,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:31,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:31,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:31,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:31,434 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:31,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:31,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:31,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:31,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:31,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:31,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:31,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:31,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:31,437 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:31,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:31,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:31,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:31,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:31,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:31,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:31,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:31,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:31,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:31,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:31,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:31,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:31,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:31,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:31,440 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:51:31,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:31,748 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:31,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:31,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:31,754 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:31,755 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-13 10:51:31,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c816dd9d/405de6f4e29b43abaf88f73a39cea016/FLAG23963f26f [2020-10-13 10:51:32,223 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:32,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-13 10:51:32,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c816dd9d/405de6f4e29b43abaf88f73a39cea016/FLAG23963f26f [2020-10-13 10:51:32,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c816dd9d/405de6f4e29b43abaf88f73a39cea016 [2020-10-13 10:51:32,669 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:32,671 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:32,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:32,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:32,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:32,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:32,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191a9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32, skipping insertion in model container [2020-10-13 10:51:32,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:32,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:32,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:32,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:32,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:32,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:32,936 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:32,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32 WrapperNode [2020-10-13 10:51:32,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:32,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:32,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:32,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:32,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:32,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (1/1) ... [2020-10-13 10:51:33,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:33,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:33,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:33,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:33,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (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 [2020-10-13 10:51:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:33,148 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:33,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:33,355 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:33,355 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:51:33,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:33 BoogieIcfgContainer [2020-10-13 10:51:33,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:33,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:33,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:33,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:33,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:32" (1/3) ... [2020-10-13 10:51:33,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb344e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:33, skipping insertion in model container [2020-10-13 10:51:33,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:32" (2/3) ... [2020-10-13 10:51:33,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb344e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:33, skipping insertion in model container [2020-10-13 10:51:33,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:33" (3/3) ... [2020-10-13 10:51:33,368 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-10-13 10:51:33,380 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:33,388 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:33,404 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:33,454 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:33,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:33,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:33,455 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:33,455 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:33,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:33,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:33,456 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:33,501 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-13 10:51:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:51:33,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:33,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:33,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-10-13 10:51:33,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:33,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720715304] [2020-10-13 10:51:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:33,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:51:33,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:51:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-13 10:51:33,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:33,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:51:33,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:33,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:33,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:33,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:33,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:33,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:33,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:33,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:33,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:33,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:51:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:34,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720715304] [2020-10-13 10:51:34,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:34,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:51:34,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2291352] [2020-10-13 10:51:34,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:51:34,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:34,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:51:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:34,030 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-13 10:51:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:34,055 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:51:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:51:34,057 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-13 10:51:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:34,067 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:34,068 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:51:34,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:51:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:51:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:51:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-13 10:51:34,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-13 10:51:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:34,115 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-13 10:51:34,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:51:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-13 10:51:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:51:34,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:34,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:34,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:34,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-10-13 10:51:34,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:34,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427762383] [2020-10-13 10:51:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:51:34,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 10:51:34,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:34,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:51:34,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:34,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:34,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:34,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:34,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:34,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:34,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:34,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:34,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427762383] [2020-10-13 10:51:34,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:34,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:51:34,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218580498] [2020-10-13 10:51:34,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:51:34,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:51:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:34,300 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-10-13 10:51:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:34,324 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-13 10:51:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:51:34,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-13 10:51:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:34,327 INFO L225 Difference]: With dead ends: 24 [2020-10-13 10:51:34,327 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:51:34,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:51:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:51:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:51:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-13 10:51:34,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-10-13 10:51:34,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:34,337 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-13 10:51:34,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:51:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-13 10:51:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:51:34,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:34,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:34,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:34,340 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-10-13 10:51:34,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:34,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802667673] [2020-10-13 10:51:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:51:34,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:34,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-13 10:51:34,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:51:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:34,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:34,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:34,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:34,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:34,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802667673] [2020-10-13 10:51:34,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:34,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:34,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075501727] [2020-10-13 10:51:34,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:34,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:34,610 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-13 10:51:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:34,656 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-13 10:51:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:34,657 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-13 10:51:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:34,658 INFO L225 Difference]: With dead ends: 23 [2020-10-13 10:51:34,658 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:51:34,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:51:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:51:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:51:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-13 10:51:34,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-13 10:51:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:34,665 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-13 10:51:34,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-13 10:51:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:51:34,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:34,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:34,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:34,667 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-10-13 10:51:34,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:34,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762358874] [2020-10-13 10:51:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:51:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-13 10:51:34,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:51:34,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:34,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:34,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:34,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:34,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:34,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:34,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:34,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:34,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:34,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:34,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:34,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762358874] [2020-10-13 10:51:34,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:34,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:51:34,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652497027] [2020-10-13 10:51:34,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:34,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:34,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:34,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:34,951 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-13 10:51:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:34,973 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-13 10:51:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:34,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 10:51:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:34,974 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:51:34,975 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:51:34,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:51:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:51:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:51:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 10:51:34,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2020-10-13 10:51:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:34,980 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 10:51:34,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 10:51:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:51:34,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:34,981 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:34,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:34,982 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:34,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-10-13 10:51:34,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:34,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070748929] [2020-10-13 10:51:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:35,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:51:35,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:35,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 10:51:35,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:35,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:51:35,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:35,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:35,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:35,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:35,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:35,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:35,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070748929] [2020-10-13 10:51:35,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:35,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:35,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707399850] [2020-10-13 10:51:35,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:35,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:35,268 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-10-13 10:51:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:35,398 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-13 10:51:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:35,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-13 10:51:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:35,399 INFO L225 Difference]: With dead ends: 26 [2020-10-13 10:51:35,399 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:51:35,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:51:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 10:51:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 10:51:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-13 10:51:35,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2020-10-13 10:51:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:35,406 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-13 10:51:35,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-13 10:51:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:51:35,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:35,407 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:35,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:35,408 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:35,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1335969749, now seen corresponding path program 2 times [2020-10-13 10:51:35,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:35,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211726408] [2020-10-13 10:51:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:35,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:51:35,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:35,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-13 10:51:35,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:35,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:35,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:51:35,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:51:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:35,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:35,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:35,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:35,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:35,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:35,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:35,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:35,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:35,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:35,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:35,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211726408] [2020-10-13 10:51:35,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:35,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:35,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981249690] [2020-10-13 10:51:35,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:35,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:35,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:35,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:35,943 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-10-13 10:51:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:36,147 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-13 10:51:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:36,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-13 10:51:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:36,150 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:51:36,151 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:51:36,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:51:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 10:51:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:51:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-13 10:51:36,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2020-10-13 10:51:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-13 10:51:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-13 10:51:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:51:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:36,161 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:36,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:36,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1396202070, now seen corresponding path program 3 times [2020-10-13 10:51:36,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:36,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755392235] [2020-10-13 10:51:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:36,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:36,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:51:36,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:36,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:36,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:36,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:36,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:36,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:36,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:36,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755392235] [2020-10-13 10:51:36,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:36,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:36,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063775812] [2020-10-13 10:51:36,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:36,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:36,854 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 11 states. [2020-10-13 10:51:38,971 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 24 [2020-10-13 10:51:41,122 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-13 10:51:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,353 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-13 10:51:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:43,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-13 10:51:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,355 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:51:43,355 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:51:43,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:51:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:51:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 10:51:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:51:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-13 10:51:43,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-10-13 10:51:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,361 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-13 10:51:43,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-13 10:51:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:51:43,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,362 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:43,363 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,363 INFO L82 PathProgramCache]: Analyzing trace with hash -480947253, now seen corresponding path program 4 times [2020-10-13 10:51:43,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555089151] [2020-10-13 10:51:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:51:43,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-13 10:51:43,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:43,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:51:43,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:44,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:44,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:44,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:44,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:44,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555089151] [2020-10-13 10:51:44,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:44,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:51:44,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459828357] [2020-10-13 10:51:44,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:51:44,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:51:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:51:44,044 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 13 states. [2020-10-13 10:51:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,253 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-13 10:51:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:44,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-13 10:51:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,260 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:44,260 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:51:44,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:51:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:51:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:51:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:51:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-13 10:51:44,267 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-10-13 10:51:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,268 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-13 10:51:44,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:51:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-13 10:51:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:51:44,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,273 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:44,274 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 5 times [2020-10-13 10:51:44,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828870296] [2020-10-13 10:51:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:51:44,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-13 10:51:44,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:51:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:45,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:45,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:45,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:45,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828870296] [2020-10-13 10:51:45,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:45,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:51:45,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760447467] [2020-10-13 10:51:45,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:51:45,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:45,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:51:45,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:45,690 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-10-13 10:51:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:46,091 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-13 10:51:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:51:46,093 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-13 10:51:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:46,094 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:51:46,094 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:51:46,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:51:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 10:51:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 10:51:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-13 10:51:46,104 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2020-10-13 10:51:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:46,105 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-13 10:51:46,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:51:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-13 10:51:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:51:46,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:46,106 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:46,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:51:46,107 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -74401941, now seen corresponding path program 6 times [2020-10-13 10:51:46,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:46,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699161859] [2020-10-13 10:51:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:51:46,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-13 10:51:46,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:51:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:51:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:47,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:47,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:47,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:47,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:47,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:47,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:47,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:47,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699161859] [2020-10-13 10:51:47,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:47,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:51:47,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392909060] [2020-10-13 10:51:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:51:47,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:51:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:51:47,461 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 17 states. [2020-10-13 10:51:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:47,837 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-13 10:51:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:51:47,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-13 10:51:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:47,838 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:51:47,839 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:51:47,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:51:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:51:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 10:51:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 10:51:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-13 10:51:47,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2020-10-13 10:51:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:47,848 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-13 10:51:47,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:51:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-13 10:51:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:51:47,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:47,849 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:47,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:51:47,849 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:47,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1006526058, now seen corresponding path program 7 times [2020-10-13 10:51:47,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:47,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527301154] [2020-10-13 10:51:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:47,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:51:48,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:48,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-10-13 10:51:48,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:51:48,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:48,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:51:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:49,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:49,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:49,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:49,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:49,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:49,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527301154] [2020-10-13 10:51:49,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:49,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:51:49,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273651327] [2020-10-13 10:51:49,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:51:49,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:49,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:51:49,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:51:49,289 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 19 states. [2020-10-13 10:51:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:51,783 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-13 10:51:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:51:51,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-13 10:51:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:51,785 INFO L225 Difference]: With dead ends: 44 [2020-10-13 10:51:51,785 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:51:51,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:51:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:51:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 10:51:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 10:51:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-13 10:51:51,798 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2020-10-13 10:51:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:51,799 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-13 10:51:51,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:51:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-13 10:51:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:51:51,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:51,801 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:51,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:51:51,801 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash -732241141, now seen corresponding path program 8 times [2020-10-13 10:51:51,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:51,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737430914] [2020-10-13 10:51:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:51,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:51:52,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:52,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1052 [2020-10-13 10:51:52,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:51:52,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:52,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:51:52,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:54,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:54,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:54,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737430914] [2020-10-13 10:51:54,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:54,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:51:54,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407741582] [2020-10-13 10:51:54,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:51:54,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:51:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:51:54,057 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 21 states. [2020-10-13 10:51:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:56,715 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:51:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:51:56,716 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 10:51:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:56,717 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:51:56,717 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 10:51:56,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:51:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 10:51:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 10:51:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:51:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-13 10:51:56,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2020-10-13 10:51:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:56,726 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-13 10:51:56,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:51:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-13 10:51:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:51:56,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:56,728 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:51:56,728 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:56,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1254690506, now seen corresponding path program 9 times [2020-10-13 10:51:56,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:56,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376458833] [2020-10-13 10:51:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:57,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:51:57,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:57,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1182 [2020-10-13 10:51:57,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:57,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:51:57,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:57,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:51:57,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:01,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:01,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:01,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:01,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:01,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:01,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:01,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:01,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:01,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376458833] [2020-10-13 10:52:01,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:01,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:52:01,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204680128] [2020-10-13 10:52:01,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:52:01,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:52:01,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=460, Unknown=1, NotChecked=0, Total=506 [2020-10-13 10:52:01,507 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 23 states. [2020-10-13 10:52:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:02,213 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-13 10:52:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:52:02,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-10-13 10:52:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:02,215 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:52:02,215 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:52:02,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=62, Invalid=639, Unknown=1, NotChecked=0, Total=702 [2020-10-13 10:52:02,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:52:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 10:52:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:52:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-10-13 10:52:02,221 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2020-10-13 10:52:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:02,221 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-10-13 10:52:02,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:52:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-10-13 10:52:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:52:02,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:02,223 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:52:02,223 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:02,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:02,223 INFO L82 PathProgramCache]: Analyzing trace with hash 696112811, now seen corresponding path program 10 times [2020-10-13 10:52:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857883227] [2020-10-13 10:52:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:03,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:03,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:52:03,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:03,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1461 [2020-10-13 10:52:03,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:52:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:03,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 10:52:03,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:04,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:04,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:04,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:04,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:04,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:04,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:04,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:04,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:04,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:52:04,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857883227] [2020-10-13 10:52:04,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:04,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:04,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207661024] [2020-10-13 10:52:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:04,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:04,508 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 25 states. [2020-10-13 10:52:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:05,308 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-13 10:52:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:52:05,309 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 43 [2020-10-13 10:52:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:05,310 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:52:05,310 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:52:05,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:52:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:52:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:52:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:52:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-13 10:52:05,321 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2020-10-13 10:52:05,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:05,322 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-13 10:52:05,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-13 10:52:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:52:05,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:05,325 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:05,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:52:05,326 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1188694230, now seen corresponding path program 11 times [2020-10-13 10:52:05,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:05,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576297438] [2020-10-13 10:52:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:07,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 10:52:07,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1737 [2020-10-13 10:52:07,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:52:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:52:07,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:07,521 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-13 10:52:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:08,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:08,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:08,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:08,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:08,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:08,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:08,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 4 proven. 180 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:52:08,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576297438] [2020-10-13 10:52:08,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:08,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:52:08,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407238827] [2020-10-13 10:52:08,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:52:08,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:52:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:52:08,680 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 25 states. [2020-10-13 10:52:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:09,040 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-13 10:52:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:52:09,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-13 10:52:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:09,041 INFO L225 Difference]: With dead ends: 47 [2020-10-13 10:52:09,041 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:52:09,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:52:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:52:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:52:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:52:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:52:09,043 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-10-13 10:52:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:09,043 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:52:09,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:52:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:52:09,044 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:52:09,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:52:09,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:52:09,186 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:52:09,186 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:52:09,186 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:52:09,186 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:52:09,187 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-10-13 10:52:09,187 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-10-13 10:52:09,188 INFO L268 CegarLoopResult]: For program point L24-2(lines 13 38) no Hoare annotation was computed. [2020-10-13 10:52:09,189 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (= (+ (* (div main_~a~0 4294967296) 4294967296) main_~b~0) (+ (* (div main_~b~0 4294967296) 4294967296) main_~a~0)) [2020-10-13 10:52:09,189 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-13 10:52:09,189 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:52:09,189 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:52:09,189 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:52:09,189 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:52:09,189 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-13 10:52:09,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:52:09 BoogieIcfgContainer [2020-10-13 10:52:09,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:52:09,198 INFO L168 Benchmark]: Toolchain (without parser) took 36527.30 ms. Allocated memory was 140.0 MB in the beginning and 465.6 MB in the end (delta: 325.6 MB). Free memory was 103.9 MB in the beginning and 205.8 MB in the end (delta: -101.9 MB). Peak memory consumption was 223.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,198 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.98 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,200 INFO L168 Benchmark]: Boogie Preprocessor took 148.27 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 93.9 MB in the beginning and 183.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,200 INFO L168 Benchmark]: RCFGBuilder took 272.42 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 169.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,201 INFO L168 Benchmark]: TraceAbstraction took 35835.32 ms. Allocated memory was 205.0 MB in the beginning and 465.6 MB in the end (delta: 260.6 MB). Free memory was 169.0 MB in the beginning and 205.8 MB in the end (delta: -36.8 MB). Peak memory consumption was 223.8 MB. Max. memory is 7.1 GB. [2020-10-13 10:52:09,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.98 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.27 ms. Allocated memory was 140.0 MB in the beginning and 205.0 MB in the end (delta: 65.0 MB). Free memory was 93.9 MB in the beginning and 183.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.42 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 169.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35835.32 ms. Allocated memory was 205.0 MB in the beginning and 465.6 MB in the end (delta: 260.6 MB). Free memory was 169.0 MB in the beginning and 205.8 MB in the end (delta: -36.8 MB). Peak memory consumption was 223.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 35.5s, OverallIterations: 15, TraceHistogramMax: 12, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 66 SDslu, 2324 SDs, 0 SdLazy, 2197 SolverSat, 25 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 20 PreInvPairs, 27 NumberOfFragments, 20 HoareAnnotationTreeSize, 20 FomulaSimplifications, 35 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 310 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 19.6s InterpolantComputationTime, 395 NumberOfCodeBlocks, 395 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 380 ConstructedInterpolants, 0 QuantifiedInterpolants, 260548 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 9/794 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...