/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 03:28:18,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 03:28:18,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 03:28:18,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 03:28:18,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 03:28:18,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 03:28:18,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 03:28:18,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 03:28:18,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 03:28:18,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 03:28:18,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 03:28:18,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 03:28:18,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 03:28:18,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 03:28:18,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 03:28:18,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 03:28:18,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 03:28:18,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 03:28:18,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 03:28:18,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 03:28:18,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 03:28:18,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 03:28:18,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 03:28:18,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 03:28:18,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 03:28:18,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 03:28:18,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 03:28:18,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 03:28:18,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 03:28:18,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 03:28:18,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 03:28:18,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 03:28:18,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 03:28:18,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 03:28:18,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 03:28:18,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 03:28:18,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 03:28:18,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 03:28:18,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 03:28:18,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 03:28:18,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 03:28:18,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 03:28:18,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 03:28:18,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 03:28:18,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 03:28:18,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 03:28:18,495 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 03:28:18,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 03:28:18,495 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 03:28:18,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 03:28:18,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 03:28:18,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 03:28:18,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 03:28:18,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 03:28:18,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 03:28:18,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 03:28:18,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 03:28:18,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 03:28:18,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 03:28:18,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 03:28:18,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 03:28:18,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 03:28:18,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 03:28:18,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:18,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 03:28:18,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 03:28:18,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 03:28:18,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 03:28:18,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 03:28:18,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 03:28:18,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 03:28:18,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-09-25 03:28:18,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 03:28:18,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 03:28:18,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 03:28:18,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 03:28:18,985 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 03:28:18,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 03:28:19,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3920109e8/7bc1307885d64a829e8a3c45d77b33ee/FLAG437e9a558 [2020-09-25 03:28:19,629 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 03:28:19,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-25 03:28:19,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3920109e8/7bc1307885d64a829e8a3c45d77b33ee/FLAG437e9a558 [2020-09-25 03:28:19,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3920109e8/7bc1307885d64a829e8a3c45d77b33ee [2020-09-25 03:28:19,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 03:28:19,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 03:28:19,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:19,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 03:28:19,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 03:28:19,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:19" (1/1) ... [2020-09-25 03:28:19,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12755b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:19, skipping insertion in model container [2020-09-25 03:28:19,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 03:28:19" (1/1) ... [2020-09-25 03:28:19,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 03:28:20,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 03:28:20,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:20,222 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 03:28:20,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 03:28:20,257 INFO L208 MainTranslator]: Completed translation [2020-09-25 03:28:20,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20 WrapperNode [2020-09-25 03:28:20,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 03:28:20,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 03:28:20,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 03:28:20,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 03:28:20,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... [2020-09-25 03:28:20,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 03:28:20,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 03:28:20,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 03:28:20,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 03:28:20,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 03:28:20,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 03:28:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 03:28:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 03:28:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 03:28:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 03:28:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 03:28:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 03:28:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 03:28:20,735 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 03:28:20,735 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 03:28:20,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:20 BoogieIcfgContainer [2020-09-25 03:28:20,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 03:28:20,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 03:28:20,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 03:28:20,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 03:28:20,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 03:28:19" (1/3) ... [2020-09-25 03:28:20,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f33529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:20, skipping insertion in model container [2020-09-25 03:28:20,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 03:28:20" (2/3) ... [2020-09-25 03:28:20,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f33529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 03:28:20, skipping insertion in model container [2020-09-25 03:28:20,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 03:28:20" (3/3) ... [2020-09-25 03:28:20,751 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-09-25 03:28:20,775 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 03:28:20,786 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 03:28:20,804 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 03:28:20,832 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 03:28:20,833 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 03:28:20,833 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 03:28:20,833 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 03:28:20,833 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 03:28:20,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 03:28:20,834 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 03:28:20,834 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 03:28:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 03:28:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 03:28:20,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:20,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:20,865 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2104509233, now seen corresponding path program 1 times [2020-09-25 03:28:20,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:20,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470262509] [2020-09-25 03:28:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:28:21,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:21,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 03:28:21,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 03:28:21,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:21,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:28:21,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:21,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:21,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 03:28:21,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:21,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470262509] [2020-09-25 03:28:21,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:21,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 03:28:21,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11837168] [2020-09-25 03:28:21,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 03:28:21,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 03:28:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 03:28:21,149 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 03:28:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:21,172 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 03:28:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 03:28:21,174 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-25 03:28:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:21,185 INFO L225 Difference]: With dead ends: 41 [2020-09-25 03:28:21,185 INFO L226 Difference]: Without dead ends: 21 [2020-09-25 03:28:21,189 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 [2020-09-25 03:28:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-25 03:28:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-25 03:28:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-25 03:28:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-25 03:28:21,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-25 03:28:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:21,255 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-25 03:28:21,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 03:28:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-25 03:28:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 03:28:21,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:21,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:21,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 03:28:21,257 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2097121065, now seen corresponding path program 1 times [2020-09-25 03:28:21,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:21,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612890454] [2020-09-25 03:28:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 03:28:21,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 03:28:21,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 03:28:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 03:28:21,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:21,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:21,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 03:28:21,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:21,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:21,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612890454] [2020-09-25 03:28:21,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 03:28:21,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 03:28:21,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091309600] [2020-09-25 03:28:21,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 03:28:21,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 03:28:21,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 03:28:21,380 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-09-25 03:28:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:21,421 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-25 03:28:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 03:28:21,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-25 03:28:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:21,423 INFO L225 Difference]: With dead ends: 28 [2020-09-25 03:28:21,423 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 03:28:21,425 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 [2020-09-25 03:28:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 03:28:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-25 03:28:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 03:28:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 03:28:21,431 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 03:28:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:21,432 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 03:28:21,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 03:28:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 03:28:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 03:28:21,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:21,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:21,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 03:28:21,434 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -588245929, now seen corresponding path program 1 times [2020-09-25 03:28:21,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:21,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152472038] [2020-09-25 03:28:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 03:28:21,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 03:28:21,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-09-25 03:28:21,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 03:28:21,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:21,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 03:28:21,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 03:28:21,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:21,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:21,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:21,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:21,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:21,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152472038] [2020-09-25 03:28:21,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:21,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 03:28:21,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50666186] [2020-09-25 03:28:21,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 03:28:21,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 03:28:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 03:28:21,960 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-09-25 03:28:22,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:22,145 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-25 03:28:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 03:28:22,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-25 03:28:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:22,147 INFO L225 Difference]: With dead ends: 35 [2020-09-25 03:28:22,147 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 03:28:22,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-25 03:28:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 03:28:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 03:28:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 03:28:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 03:28:22,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 03:28:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:22,155 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 03:28:22,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 03:28:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 03:28:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 03:28:22,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:22,156 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:22,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 03:28:22,157 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -590441495, now seen corresponding path program 2 times [2020-09-25 03:28:22,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:22,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035871996] [2020-09-25 03:28:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 03:28:22,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 03:28:22,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-09-25 03:28:22,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 03:28:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 03:28:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:22,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:22,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:22,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:22,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:22,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035871996] [2020-09-25 03:28:22,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:22,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 03:28:22,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391594628] [2020-09-25 03:28:22,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 03:28:22,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 03:28:22,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-25 03:28:22,702 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-09-25 03:28:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:22,894 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-25 03:28:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 03:28:22,894 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-09-25 03:28:22,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:22,896 INFO L225 Difference]: With dead ends: 38 [2020-09-25 03:28:22,896 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 03:28:22,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:28:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 03:28:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 03:28:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 03:28:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 03:28:22,902 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 03:28:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:22,903 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 03:28:22,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 03:28:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 03:28:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 03:28:22,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:22,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:22,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 03:28:22,905 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash -934609001, now seen corresponding path program 3 times [2020-09-25 03:28:22,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:22,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285176500] [2020-09-25 03:28:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:23,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 03:28:23,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 03:28:23,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-09-25 03:28:23,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 03:28:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 03:28:23,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:23,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:23,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:23,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:23,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:23,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:23,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:23,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:23,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:23,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:23,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285176500] [2020-09-25 03:28:23,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:23,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 03:28:23,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390496382] [2020-09-25 03:28:23,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 03:28:23,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 03:28:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-25 03:28:23,892 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-09-25 03:28:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:24,155 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-25 03:28:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 03:28:24,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-09-25 03:28:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:24,157 INFO L225 Difference]: With dead ends: 43 [2020-09-25 03:28:24,157 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 03:28:24,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-09-25 03:28:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 03:28:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-25 03:28:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 03:28:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 03:28:24,165 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 03:28:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:24,166 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 03:28:24,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 03:28:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 03:28:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 03:28:24,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:24,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:24,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 03:28:24,168 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1774497961, now seen corresponding path program 4 times [2020-09-25 03:28:24,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:24,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618368984] [2020-09-25 03:28:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:24,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:24,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:24,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 03:28:24,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 03:28:24,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-09-25 03:28:24,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:24,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 03:28:24,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:24,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 03:28:24,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:25,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:25,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:25,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:25,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:25,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:25,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:25,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:25,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618368984] [2020-09-25 03:28:25,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:25,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 03:28:25,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78537843] [2020-09-25 03:28:25,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 03:28:25,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 03:28:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-25 03:28:25,167 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-09-25 03:28:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:25,533 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-09-25 03:28:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 03:28:25,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-09-25 03:28:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:25,535 INFO L225 Difference]: With dead ends: 48 [2020-09-25 03:28:25,535 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 03:28:25,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-09-25 03:28:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 03:28:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-25 03:28:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 03:28:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 03:28:25,555 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 03:28:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:25,556 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 03:28:25,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 03:28:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 03:28:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 03:28:25,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:25,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:25,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 03:28:25,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash -194454825, now seen corresponding path program 5 times [2020-09-25 03:28:25,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:25,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071240134] [2020-09-25 03:28:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:26,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:26,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 03:28:26,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 03:28:26,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-09-25 03:28:26,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 03:28:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:26,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 03:28:26,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 03:28:27,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:27,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:27,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:27,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:27,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:27,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:27,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:27,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:27,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071240134] [2020-09-25 03:28:27,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:27,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 03:28:27,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339915816] [2020-09-25 03:28:27,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 03:28:27,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:27,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 03:28:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-25 03:28:27,300 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-09-25 03:28:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:27,817 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-09-25 03:28:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 03:28:27,818 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-09-25 03:28:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:27,819 INFO L225 Difference]: With dead ends: 53 [2020-09-25 03:28:27,819 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 03:28:27,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 03:28:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 03:28:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-25 03:28:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 03:28:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-25 03:28:27,826 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-25 03:28:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:27,827 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-25 03:28:27,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 03:28:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-25 03:28:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 03:28:27,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:27,828 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:27,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 03:28:27,829 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1783487849, now seen corresponding path program 6 times [2020-09-25 03:28:27,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:27,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673300566] [2020-09-25 03:28:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:27,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:27,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:28,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:29,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 03:28:29,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 03:28:29,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1785 [2020-09-25 03:28:29,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:29,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 03:28:29,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:29,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 03:28:29,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:29,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:29,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:29,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:29,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:29,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:29,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:29,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:29,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:29,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:29,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673300566] [2020-09-25 03:28:29,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:29,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 03:28:29,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013246186] [2020-09-25 03:28:29,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 03:28:29,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 03:28:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-09-25 03:28:29,985 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-09-25 03:28:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:30,575 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-25 03:28:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 03:28:30,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-09-25 03:28:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:30,576 INFO L225 Difference]: With dead ends: 58 [2020-09-25 03:28:30,576 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 03:28:30,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 03:28:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 03:28:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-25 03:28:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 03:28:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 03:28:30,584 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-25 03:28:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:30,585 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 03:28:30,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 03:28:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 03:28:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 03:28:30,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:30,586 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:30,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 03:28:30,586 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1046324759, now seen corresponding path program 7 times [2020-09-25 03:28:30,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:30,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403980309] [2020-09-25 03:28:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:30,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:32,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:32,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 03:28:32,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2208 [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 03:28:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:33,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:33,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:33,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:33,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:33,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:33,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:33,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:33,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:33,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:33,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:33,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403980309] [2020-09-25 03:28:33,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:33,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 03:28:33,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450722426] [2020-09-25 03:28:33,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 03:28:33,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:33,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 03:28:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-09-25 03:28:33,212 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2020-09-25 03:28:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:34,079 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-25 03:28:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 03:28:34,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-09-25 03:28:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:34,081 INFO L225 Difference]: With dead ends: 63 [2020-09-25 03:28:34,081 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 03:28:34,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2020-09-25 03:28:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 03:28:34,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-25 03:28:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 03:28:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-25 03:28:34,089 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-25 03:28:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:34,090 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-25 03:28:34,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 03:28:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-25 03:28:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 03:28:34,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:34,091 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:34,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 03:28:34,091 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash 232135209, now seen corresponding path program 8 times [2020-09-25 03:28:34,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:34,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522733061] [2020-09-25 03:28:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:35,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:36,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:37,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 03:28:37,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 03:28:37,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3133 [2020-09-25 03:28:37,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-25 03:28:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 03:28:37,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:37,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:37,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:37,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:37,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:37,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:37,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:37,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522733061] [2020-09-25 03:28:37,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:37,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 03:28:37,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829769846] [2020-09-25 03:28:37,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 03:28:37,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 03:28:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-09-25 03:28:37,730 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2020-09-25 03:28:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:38,832 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-09-25 03:28:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-25 03:28:38,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-09-25 03:28:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:38,834 INFO L225 Difference]: With dead ends: 68 [2020-09-25 03:28:38,834 INFO L226 Difference]: Without dead ends: 63 [2020-09-25 03:28:38,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 03:28:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-25 03:28:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-25 03:28:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 03:28:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-25 03:28:38,844 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-25 03:28:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:38,845 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-25 03:28:38,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 03:28:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-25 03:28:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 03:28:38,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:38,846 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:38,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 03:28:38,847 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:38,847 INFO L82 PathProgramCache]: Analyzing trace with hash 977101143, now seen corresponding path program 9 times [2020-09-25 03:28:38,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344937720] [2020-09-25 03:28:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:38,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:41,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 03:28:42,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 03:28:42,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3186 [2020-09-25 03:28:42,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 03:28:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:42,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 03:28:42,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:42,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:42,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:42,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:42,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:42,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 03:28:42,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:42,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:42,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344937720] [2020-09-25 03:28:42,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:42,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 03:28:42,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466074531] [2020-09-25 03:28:42,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 03:28:42,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:42,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 03:28:42,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 03:28:42,861 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 33 states. [2020-09-25 03:28:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:44,227 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-09-25 03:28:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 03:28:44,228 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-09-25 03:28:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:44,229 INFO L225 Difference]: With dead ends: 73 [2020-09-25 03:28:44,229 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 03:28:44,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=194, Invalid=2998, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 03:28:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 03:28:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-25 03:28:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 03:28:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-25 03:28:44,237 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-25 03:28:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:44,238 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-25 03:28:44,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 03:28:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-25 03:28:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 03:28:44,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 03:28:44,239 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 03:28:44,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 03:28:44,240 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 03:28:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 03:28:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash 751396585, now seen corresponding path program 10 times [2020-09-25 03:28:44,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 03:28:44,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172188551] [2020-09-25 03:28:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 03:28:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:44,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:45,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:46,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:48,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:49,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:49,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:49,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 03:28:49,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 03:28:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 03:28:49,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 03:28:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 03:28:49,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 03:28:49,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 03:28:50,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 03:28:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 03:28:50,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 03:28:50,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 03:28:50,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 03:28:50,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 03:28:50,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 03:28:50,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDEST [2020-09-25 03:28:50,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 03:28:50,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 03:28:50,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 03:28:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 03:28:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 03:28:50,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172188551] [2020-09-25 03:28:50,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 03:28:50,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-25 03:28:50,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549656850] [2020-09-25 03:28:50,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-25 03:28:50,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 03:28:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-25 03:28:50,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 03:28:50,401 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2020-09-25 03:28:53,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 03:28:53,466 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-25 03:28:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 03:28:53,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-09-25 03:28:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 03:28:53,467 INFO L225 Difference]: With dead ends: 67 [2020-09-25 03:28:53,467 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 03:28:53,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=508, Invalid=4048, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 03:28:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 03:28:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 03:28:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 03:28:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 03:28:53,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-25 03:28:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 03:28:53,470 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 03:28:53,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-25 03:28:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 03:28:53,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 03:28:53,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 03:28:53,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 03:28:53,731 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-09-25 03:28:53,735 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 03:28:53,735 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 03:28:53,736 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 03:28:53,736 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 03:28:53,736 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 03:28:53,736 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 03:28:53,736 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 03:28:53,736 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 03:28:53,737 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 03:28:53,738 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-25 03:28:53,738 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 03:28:53,738 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-09-25 03:28:53,738 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-09-25 03:28:53,738 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 03:28:53,738 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 03:28:53,739 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-25 03:28:53,739 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-25 03:28:53,739 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 03:28:53,739 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (let ((.cse0 (* 3 main_~y~0)) (.cse1 (<= main_~x~0 (+ main_~y~0 7)))) (or (and (<= main_~x~0 (+ (* 4 main_~y~0) 2)) (or (<= (+ main_~x~0 2) 0) (<= 1 main_~y~0)) (<= main_~x~0 (+ .cse0 2)) .cse1) (and (<= (+ (* 3 main_~x~0) (* 11 main_~y~0) 148) (* 20 (div (+ main_~x~0 (* main_~y~0 2) 51) 5))) (<= (+ main_~x~0 56) .cse0) .cse1) (let ((.cse2 (+ main_~x~0 51))) (and (<= .cse2 main_~y~0) (<= main_~y~0 .cse2))) (let ((.cse3 (+ main_~x~0 50))) (and (<= 0 .cse3) (<= .cse3 0))) (let ((.cse5 (* 2 main_~y~0)) (.cse4 (+ main_~x~0 53))) (and (<= .cse4 .cse5) (<= .cse5 .cse4) .cse1)))) [2020-09-25 03:28:53,739 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 03:28:53,740 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 11 main_~y~0) (<= (+ main_~x~0 95) (* 9 main_~y~0))) (and (<= main_~x~0 (+ (* 3 main_~y~0) 2)) (<= 1 main_~y~0) (<= main_~x~0 (+ main_~y~0 7)))) [2020-09-25 03:28:53,740 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 03:28:53,740 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 03:28:53,740 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 03:28:53,740 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 03:28:53,741 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 03:28:53,741 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 03:28:53,741 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 03:28:53,741 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 03:28:53,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 03:28:53 BoogieIcfgContainer [2020-09-25 03:28:53,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 03:28:53,768 INFO L168 Benchmark]: Toolchain (without parser) took 33795.10 ms. Allocated memory was 141.0 MB in the beginning and 406.8 MB in the end (delta: 265.8 MB). Free memory was 104.6 MB in the beginning and 335.6 MB in the end (delta: -231.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,769 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.77 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,771 INFO L168 Benchmark]: Boogie Preprocessor took 110.61 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 184.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,772 INFO L168 Benchmark]: RCFGBuilder took 371.84 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,773 INFO L168 Benchmark]: TraceAbstraction took 33023.57 ms. Allocated memory was 204.5 MB in the beginning and 406.8 MB in the end (delta: 202.4 MB). Free memory was 170.1 MB in the beginning and 335.6 MB in the end (delta: -165.5 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-09-25 03:28:53,776 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 280.77 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 94.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.61 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 184.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.84 ms. Allocated memory is still 204.5 MB. Free memory was 184.5 MB in the beginning and 170.8 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33023.57 ms. Allocated memory was 204.5 MB in the beginning and 406.8 MB in the end (delta: 202.4 MB). Free memory was 170.1 MB in the beginning and 335.6 MB in the end (delta: -165.5 MB). Peak memory consumption was 36.9 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 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((x <= 4 * y + 2 && (x + 2 <= 0 || 1 <= y)) && x <= 3 * y + 2) && x <= y + 7) || ((3 * x + 11 * y + 148 <= 20 * ((x + y * 2 + 51) / 5) && x + 56 <= 3 * y) && x <= y + 7)) || (x + 51 <= y && y <= x + 51)) || (0 <= x + 50 && x + 50 <= 0)) || ((x + 53 <= 2 * y && 2 * y <= x + 53) && x <= y + 7) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.6s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 275 SDslu, 2168 SDs, 0 SdLazy, 5092 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 406 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=11, 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, 12 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 38 NumberOfFragments, 137 HoareAnnotationTreeSize, 18 FomulaSimplifications, 238 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 150 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 455 ConstructedInterpolants, 0 QuantifiedInterpolants, 125735 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 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...