/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=NARROWEST --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/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:20:34,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:20:34,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:20:34,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:20:34,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:20:34,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:20:34,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:20:34,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:20:34,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:20:34,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:20:34,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:20:34,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:20:34,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:20:34,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:20:34,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:20:34,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:20:34,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:20:34,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:20:34,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:20:34,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:20:34,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:20:34,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:20:34,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:20:34,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:20:34,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:20:34,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:20:34,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:20:34,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:20:34,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:20:34,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:20:34,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:20:34,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:20:34,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:20:34,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:20:34,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:20:34,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:20:34,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:20:34,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:20:34,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:20:34,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:20:34,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:20:34,476 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 02:20:34,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:20:34,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:20:34,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:20:34,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:20:34,524 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:20:34,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:20:34,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:20:34,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:20:34,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:20:34,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:20:34,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:20:34,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:20:34,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:20:34,527 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:20:34,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:20:34,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:20:34,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:20:34,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:20:34,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:20:34,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:20:34,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:20:34,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:20:34,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:20:34,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:20:34,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:20:34,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:20:34,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:20:34,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:20:34,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:20:34,530 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:20:34,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:20:34,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:20:34,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:20:34,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:20:34,987 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:20:34,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-25 02:20:35,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0042d4509/1379902f5a7f4a89a50d8c6498613593/FLAG3368fb597 [2020-09-25 02:20:35,600 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:20:35,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-09-25 02:20:35,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0042d4509/1379902f5a7f4a89a50d8c6498613593/FLAG3368fb597 [2020-09-25 02:20:35,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0042d4509/1379902f5a7f4a89a50d8c6498613593 [2020-09-25 02:20:35,963 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:20:35,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:20:35,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:35,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:20:35,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:20:35,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:35" (1/1) ... [2020-09-25 02:20:35,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e983976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:35, skipping insertion in model container [2020-09-25 02:20:35,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:20:35" (1/1) ... [2020-09-25 02:20:35,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:20:36,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:20:36,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:36,221 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:20:36,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:20:36,259 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:20:36,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36 WrapperNode [2020-09-25 02:20:36,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:20:36,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:20:36,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:20:36,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:20:36,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (1/1) ... [2020-09-25 02:20:36,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:20:36,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:20:36,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:20:36,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:20:36,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (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 02:20:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:20:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:20:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:20:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:20:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:20:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:20:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:20:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:20:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:20:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:20:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:20:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:20:36,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:20:36,737 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:20:36,738 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:20:36,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:36 BoogieIcfgContainer [2020-09-25 02:20:36,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:20:36,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:20:36,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:20:36,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:20:36,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:20:35" (1/3) ... [2020-09-25 02:20:36,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412c1aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:36, skipping insertion in model container [2020-09-25 02:20:36,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:20:36" (2/3) ... [2020-09-25 02:20:36,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@412c1aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:20:36, skipping insertion in model container [2020-09-25 02:20:36,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:20:36" (3/3) ... [2020-09-25 02:20:36,765 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-09-25 02:20:36,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:20:36,797 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:20:36,815 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:20:36,844 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:20:36,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:20:36,845 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:20:36,845 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:20:36,845 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:20:36,845 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:20:36,845 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:20:36,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:20:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-25 02:20:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-25 02:20:36,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:36,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:36,875 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1686675663, now seen corresponding path program 1 times [2020-09-25 02:20:36,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:36,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249266128] [2020-09-25 02:20:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:37,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:20:37,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:20:37,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-25 02:20:37,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 02:20:37,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:20:37,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:37,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:37,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:37,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:37,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:37,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:37,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:37,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:37,321 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 02:20:37,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249266128] [2020-09-25 02:20:37,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:37,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 02:20:37,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415249542] [2020-09-25 02:20:37,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 02:20:37,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 02:20:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 02:20:37,356 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2020-09-25 02:20:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:37,394 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-09-25 02:20:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 02:20:37,396 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-09-25 02:20:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:37,412 INFO L225 Difference]: With dead ends: 57 [2020-09-25 02:20:37,412 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 02:20:37,418 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 02:20:37,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 02:20:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-25 02:20:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 02:20:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-09-25 02:20:37,480 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 22 [2020-09-25 02:20:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:37,480 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-09-25 02:20:37,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 02:20:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-09-25 02:20:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 02:20:37,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:37,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:37,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:20:37,484 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 779060326, now seen corresponding path program 1 times [2020-09-25 02:20:37,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:37,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242192188] [2020-09-25 02:20:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:37,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:37,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:37,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 02:20:37,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:37,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-09-25 02:20:37,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:37,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 02:20:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:20:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 02:20:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:38,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:38,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:38,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:38,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:38,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 02:20:38,050 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 02:20:38,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242192188] [2020-09-25 02:20:38,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:38,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:20:38,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123948439] [2020-09-25 02:20:38,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:20:38,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:38,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:20:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:20:38,058 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2020-09-25 02:20:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:38,177 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-09-25 02:20:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:20:38,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-25 02:20:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:38,180 INFO L225 Difference]: With dead ends: 49 [2020-09-25 02:20:38,180 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 02:20:38,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:20:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 02:20:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-09-25 02:20:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-25 02:20:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-25 02:20:38,191 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2020-09-25 02:20:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:38,192 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-25 02:20:38,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:20:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-25 02:20:38,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:20:38,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:38,194 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:38,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:20:38,194 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash -579098768, now seen corresponding path program 1 times [2020-09-25 02:20:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:38,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977482755] [2020-09-25 02:20:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:38,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:38,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:20:38,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:38,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-09-25 02:20:38,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:38,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:20:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:20:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-25 02:20:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:38,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:38,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:38,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:38,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:38,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:38,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:38,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:38,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977482755] [2020-09-25 02:20:38,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:38,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:20:38,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907778217] [2020-09-25 02:20:38,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:20:38,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:20:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:20:38,909 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2020-09-25 02:20:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:39,189 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-09-25 02:20:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:20:39,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-25 02:20:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:39,192 INFO L225 Difference]: With dead ends: 67 [2020-09-25 02:20:39,192 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 02:20:39,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:20:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 02:20:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-09-25 02:20:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 02:20:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-09-25 02:20:39,206 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 34 [2020-09-25 02:20:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:39,208 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-09-25 02:20:39,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:20:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-09-25 02:20:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 02:20:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:39,211 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:39,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:20:39,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -44019760, now seen corresponding path program 1 times [2020-09-25 02:20:39,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:39,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378660363] [2020-09-25 02:20:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:39,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:39,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:20:39,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:20:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-09-25 02:20:39,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:20:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 02:20:39,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 02:20:39,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:39,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:39,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:39,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:39,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:39,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:20:39,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:39,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:39,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:39,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:39,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378660363] [2020-09-25 02:20:39,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:39,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:20:39,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413500935] [2020-09-25 02:20:39,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:20:39,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:20:39,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:20:39,583 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2020-09-25 02:20:39,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:39,639 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2020-09-25 02:20:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:20:39,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-25 02:20:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:39,644 INFO L225 Difference]: With dead ends: 95 [2020-09-25 02:20:39,644 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 02:20:39,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:20:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 02:20:39,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-09-25 02:20:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 02:20:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-25 02:20:39,664 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 34 [2020-09-25 02:20:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:39,665 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-25 02:20:39,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:20:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-25 02:20:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 02:20:39,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:39,667 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:39,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:20:39,668 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:39,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:39,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1711187313, now seen corresponding path program 1 times [2020-09-25 02:20:39,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:39,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481918615] [2020-09-25 02:20:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:39,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:39,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 02:20:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 02:20:39,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:39,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:20:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 02:20:39,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 02:20:39,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:39,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:39,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:39,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:39,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:39,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:39,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:39,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:39,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:39,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:39,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:20:39,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481918615] [2020-09-25 02:20:39,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:39,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:20:39,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457519334] [2020-09-25 02:20:39,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:20:39,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:20:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:20:39,772 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 3 states. [2020-09-25 02:20:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:39,782 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-09-25 02:20:39,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:20:39,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-09-25 02:20:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:39,784 INFO L225 Difference]: With dead ends: 81 [2020-09-25 02:20:39,784 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 02:20:39,785 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 02:20:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 02:20:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-25 02:20:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:20:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 02:20:39,794 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 36 [2020-09-25 02:20:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:39,795 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 02:20:39,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:20:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 02:20:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 02:20:39,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:39,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:39,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:20:39,798 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1122436602, now seen corresponding path program 2 times [2020-09-25 02:20:39,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:39,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136718540] [2020-09-25 02:20:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:40,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:40,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 02:20:40,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:40,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-09-25 02:20:40,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 02:20:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-25 02:20:40,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 02:20:40,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:40,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:40,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:40,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:40,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:40,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:40,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:20:40,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:40,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:40,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:40,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:40,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:40,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136718540] [2020-09-25 02:20:40,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:40,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 02:20:40,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537375419] [2020-09-25 02:20:40,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 02:20:40,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 02:20:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-09-25 02:20:40,767 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-09-25 02:20:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:41,311 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-09-25 02:20:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:20:41,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-09-25 02:20:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:41,314 INFO L225 Difference]: With dead ends: 81 [2020-09-25 02:20:41,314 INFO L226 Difference]: Without dead ends: 71 [2020-09-25 02:20:41,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-25 02:20:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-25 02:20:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-09-25 02:20:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:20:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-25 02:20:41,325 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 44 [2020-09-25 02:20:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:41,327 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-25 02:20:41,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 02:20:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-25 02:20:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 02:20:41,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:20:41,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:20:41,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:20:41,329 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:20:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:20:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 937303643, now seen corresponding path program 1 times [2020-09-25 02:20:41,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:20:41,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131351616] [2020-09-25 02:20:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:20:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:41,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:41,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:41,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 02:20:41,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:20:41,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-09-25 02:20:41,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:20:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 02:20:41,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 02:20:41,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:41,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:41,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:41,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:41,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 02:20:41,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 02:20:41,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:41,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:41,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 02:20:41,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131351616] [2020-09-25 02:20:41,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:20:41,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:20:41,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889351019] [2020-09-25 02:20:41,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:20:41,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:20:41,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:20:41,805 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 4 states. [2020-09-25 02:20:41,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:20:41,827 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-09-25 02:20:41,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:20:41,829 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-25 02:20:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:20:41,830 INFO L225 Difference]: With dead ends: 59 [2020-09-25 02:20:41,830 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:20:41,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:20:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:20:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:20:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:20:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:20:41,833 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-09-25 02:20:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:20:41,834 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:20:41,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:20:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:20:41,834 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:20:41,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:20:41,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:20:41,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 02:20:41,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:41,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:20:41,905 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 02:20:41,905 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:20:41,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:20:41,905 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-09-25 02:20:41,906 INFO L268 CegarLoopResult]: For program point L31-2(line 31) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 38) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point L19(lines 19 23) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-09-25 02:20:41,907 INFO L268 CegarLoopResult]: For program point L15-2(line 15) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L28-2(lines 13 38) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L24-3(line 24) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 02:20:41,908 INFO L268 CegarLoopResult]: For program point L24-4(lines 13 38) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L25-2(line 25) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 02:20:41,909 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 38) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 38) the Hoare annotation is: true [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-25 02:20:41,910 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-25 02:20:41,911 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~a~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~b~0 4294967296)) main_~a~0))) (and (<= main_~b~0 main_~a~0) (< .cse0 (+ .cse1 main_~b~0 1)) (<= (+ .cse1 main_~b~0) .cse0))) [2020-09-25 02:20:41,911 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 02:20:41,911 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:41,911 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 02:20:41,911 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 02:20:41,912 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 02:20:41,912 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 02:20:41,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:20:41 BoogieIcfgContainer [2020-09-25 02:20:41,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 02:20:41,923 INFO L168 Benchmark]: Toolchain (without parser) took 5956.14 ms. Allocated memory was 142.1 MB in the beginning and 270.5 MB in the end (delta: 128.5 MB). Free memory was 104.5 MB in the beginning and 211.7 MB in the end (delta: -107.2 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:41,924 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 02:20:41,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.88 ms. Allocated memory is still 142.1 MB. Free memory was 103.9 MB in the beginning and 94.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:41,926 INFO L168 Benchmark]: Boogie Preprocessor took 113.07 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 184.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:41,927 INFO L168 Benchmark]: RCFGBuilder took 368.84 ms. Allocated memory is still 205.5 MB. Free memory was 184.4 MB in the beginning and 169.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:41,928 INFO L168 Benchmark]: TraceAbstraction took 5167.28 ms. Allocated memory was 205.5 MB in the beginning and 270.5 MB in the end (delta: 65.0 MB). Free memory was 169.1 MB in the beginning and 211.7 MB in the end (delta: -42.6 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-09-25 02:20:41,931 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.88 ms. Allocated memory is still 142.1 MB. Free memory was 103.9 MB in the beginning and 94.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.07 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 184.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.84 ms. Allocated memory is still 205.5 MB. Free memory was 184.4 MB in the beginning and 169.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5167.28 ms. Allocated memory was 205.5 MB in the beginning and 270.5 MB in the end (delta: 65.0 MB). Free memory was 169.1 MB in the beginning and 211.7 MB in the end (delta: -42.6 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 277 SDtfs, 166 SDslu, 697 SDs, 0 SdLazy, 308 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 45 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 13 PreInvPairs, 17 NumberOfFragments, 40 HoareAnnotationTreeSize, 13 FomulaSimplifications, 23 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 233 ConstructedInterpolants, 0 QuantifiedInterpolants, 64399 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 17/33 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...