/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 --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 interpolation-heuristic=FIRST --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-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:23,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:23,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:23,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:23,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:23,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:23,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:23,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:23,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:23,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:23,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:23,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:23,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:23,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:23,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:23,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:23,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:23,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:23,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:23,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:23,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:23,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:23,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:23,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:23,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:23,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:23,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:23,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:23,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:23,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:23,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:23,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:23,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:23,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:23,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:23,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:23,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:23,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:23,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:23,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:23,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:23,957 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 [2020-09-21 11:31:23,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:23,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:23,987 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:23,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:23,987 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:23,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:23,988 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:23,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:23,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:23,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:23,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:23,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:23,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:23,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:23,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:23,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:23,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:23,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:23,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:23,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:23,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:23,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:23,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:23,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:23,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:23,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:23,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:23,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:23,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:23,992 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:24,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:24,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:24,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:24,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:24,544 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:24,546 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-21 11:31:24,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8aafa4f34/eb2d08b7d904410d86c052927581eb38/FLAGfea49dcde [2020-09-21 11:31:25,165 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:25,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-09-21 11:31:25,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8aafa4f34/eb2d08b7d904410d86c052927581eb38/FLAGfea49dcde [2020-09-21 11:31:25,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8aafa4f34/eb2d08b7d904410d86c052927581eb38 [2020-09-21 11:31:25,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:25,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:25,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:25,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:25,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:25,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656101fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25, skipping insertion in model container [2020-09-21 11:31:25,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:25,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:25,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:25,840 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:25,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:25,885 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:25,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25 WrapperNode [2020-09-21 11:31:25,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:25,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:25,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:25,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:25,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:26,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:26,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:26,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:26,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:26,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (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 [2020-09-21 11:31:26,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:26,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:26,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:26,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:26,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:26,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:31:26,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:26,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:26,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:26,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:26,331 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:26,332 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:31:26,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:26 BoogieIcfgContainer [2020-09-21 11:31:26,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:26,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:26,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:26,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:26,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:25" (1/3) ... [2020-09-21 11:31:26,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724f159e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:26, skipping insertion in model container [2020-09-21 11:31:26,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (2/3) ... [2020-09-21 11:31:26,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724f159e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:26, skipping insertion in model container [2020-09-21 11:31:26,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:26" (3/3) ... [2020-09-21 11:31:26,358 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-09-21 11:31:26,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:26,380 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:26,402 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:26,427 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:26,427 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:26,427 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:26,427 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:26,427 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:26,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:26,428 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:26,428 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 11:31:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:31:26,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:26,455 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-09-21 11:31:26,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324159363] [2020-09-21 11:31:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,604 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,604 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,604 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,604 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:31:26,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:26,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:26,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:26,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,682 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,683 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,683 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,683 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:26,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324159363] [2020-09-21 11:31:26,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:26,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:26,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580793891] [2020-09-21 11:31:26,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:26,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:26,732 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-21 11:31:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,868 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-09-21 11:31:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:26,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-09-21 11:31:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,882 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:31:26,882 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:31:26,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:31:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 11:31:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:31:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-09-21 11:31:26,957 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-09-21 11:31:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,958 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-09-21 11:31:26,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-09-21 11:31:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:31:26,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:26,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:26,960 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-09-21 11:31:26,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559055060] [2020-09-21 11:31:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,004 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,004 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,004 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,005 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:31:27,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:31:27,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,053 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,053 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,053 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,054 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559055060] [2020-09-21 11:31:27,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:27,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:27,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623647486] [2020-09-21 11:31:27,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:27,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:27,068 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-09-21 11:31:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,163 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-09-21 11:31:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:27,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-09-21 11:31:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,167 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:31:27,167 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:31:27,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:31:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-21 11:31:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:31:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-09-21 11:31:27,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-09-21 11:31:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,179 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-09-21 11:31:27,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-09-21 11:31:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:31:27,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:27,181 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-09-21 11:31:27,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259583194] [2020-09-21 11:31:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,215 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,216 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,216 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,216 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,288 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,289 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,289 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,289 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259583194] [2020-09-21 11:31:27,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:27,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653945914] [2020-09-21 11:31:27,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:27,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:27,301 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-09-21 11:31:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,390 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-09-21 11:31:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:27,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 11:31:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,393 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:31:27,393 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:31:27,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:31:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-09-21 11:31:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:31:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 11:31:27,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-21 11:31:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,406 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 11:31:27,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 11:31:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:27,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:27,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-09-21 11:31:27,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749498582] [2020-09-21 11:31:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,457 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,457 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,457 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,458 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:31:27,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:31:27,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:27,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,546 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,547 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,547 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,548 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749498582] [2020-09-21 11:31:27,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087895113] [2020-09-21 11:31:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:27,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:27,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,577 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-21 11:31:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,714 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-09-21 11:31:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:27,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 11:31:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,716 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:31:27,716 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:31:27,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:31:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-09-21 11:31:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:31:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-09-21 11:31:27,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-09-21 11:31:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,725 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-09-21 11:31:27,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-09-21 11:31:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:31:27,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:27,727 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-09-21 11:31:27,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589699176] [2020-09-21 11:31:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,768 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,769 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,769 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:31:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-21 11:31:27,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,837 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,837 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,838 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,838 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589699176] [2020-09-21 11:31:27,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:27,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148032057] [2020-09-21 11:31:27,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:27,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,847 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-09-21 11:31:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,952 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-09-21 11:31:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:27,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 11:31:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,953 INFO L225 Difference]: With dead ends: 67 [2020-09-21 11:31:27,954 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:31:27,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:31:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 11:31:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:31:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-21 11:31:27,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-09-21 11:31:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,963 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-21 11:31:27,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-21 11:31:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:31:27,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,964 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:27,965 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,965 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-09-21 11:31:27,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213608497] [2020-09-21 11:31:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,000 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,004 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,004 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,069 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,069 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,069 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,070 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 11:31:28,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213608497] [2020-09-21 11:31:28,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:28,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:31:28,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522534520] [2020-09-21 11:31:28,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:28,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:28,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:28,078 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-09-21 11:31:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,173 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-09-21 11:31:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:28,174 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 11:31:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,176 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:31:28,176 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:31:28,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:31:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-21 11:31:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 11:31:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-21 11:31:28,185 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-09-21 11:31:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,186 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-21 11:31:28,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-21 11:31:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:31:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,187 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:28,188 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-09-21 11:31:28,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491751624] [2020-09-21 11:31:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,227 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,227 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,227 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,227 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:31:28,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:31:28,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:28,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,314 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,314 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,314 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,315 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:28,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491751624] [2020-09-21 11:31:28,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:28,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741641338] [2020-09-21 11:31:28,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:28,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:28,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,323 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-09-21 11:31:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,432 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-09-21 11:31:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:28,432 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-21 11:31:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,433 INFO L225 Difference]: With dead ends: 77 [2020-09-21 11:31:28,434 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:31:28,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:31:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-09-21 11:31:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-21 11:31:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-09-21 11:31:28,442 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-09-21 11:31:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,443 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-09-21 11:31:28,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-09-21 11:31:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:31:28,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:28,445 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-09-21 11:31:28,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454803938] [2020-09-21 11:31:28,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,487 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,487 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,487 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:31:28,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:31:28,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:31:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:31:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,578 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,579 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,581 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:31:28,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:28,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454803938] [2020-09-21 11:31:28,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:28,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435352026] [2020-09-21 11:31:28,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:28,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:28,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:28,597 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-09-21 11:31:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,740 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-09-21 11:31:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:28,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-21 11:31:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,742 INFO L225 Difference]: With dead ends: 88 [2020-09-21 11:31:28,742 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:31:28,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:31:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-09-21 11:31:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-21 11:31:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-09-21 11:31:28,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-09-21 11:31:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,752 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-09-21 11:31:28,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-09-21 11:31:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:31:28,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,754 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:28,754 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-09-21 11:31:28,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276533845] [2020-09-21 11:31:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,798 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,799 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,799 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,799 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:31:28,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:28,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:28,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:28,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,930 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,930 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,930 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,932 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:28,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:28,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276533845] [2020-09-21 11:31:28,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:31:28,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633775183] [2020-09-21 11:31:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:31:28,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:31:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:28,949 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-09-21 11:31:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,092 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-09-21 11:31:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:29,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-09-21 11:31:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,094 INFO L225 Difference]: With dead ends: 99 [2020-09-21 11:31:29,094 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:31:29,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:31:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-09-21 11:31:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 11:31:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-09-21 11:31:29,109 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-09-21 11:31:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,111 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-09-21 11:31:29,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:31:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-09-21 11:31:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:31:29,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,113 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:29,115 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-09-21 11:31:29,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805795390] [2020-09-21 11:31:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,182 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,183 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,183 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,183 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:31:29,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:31:29,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,295 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805795390] [2020-09-21 11:31:29,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:29,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815565443] [2020-09-21 11:31:29,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:29,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:29,304 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-09-21 11:31:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,437 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-09-21 11:31:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:29,437 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-21 11:31:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,438 INFO L225 Difference]: With dead ends: 110 [2020-09-21 11:31:29,439 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 11:31:29,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 11:31:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-09-21 11:31:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 11:31:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-09-21 11:31:29,446 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-09-21 11:31:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,447 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-09-21 11:31:29,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-09-21 11:31:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:31:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,448 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:29,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-09-21 11:31:29,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821183220] [2020-09-21 11:31:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,491 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,492 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,492 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:31:29,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:31:29,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:31:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,594 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,594 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,594 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,595 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:29,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821183220] [2020-09-21 11:31:29,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:31:29,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722083402] [2020-09-21 11:31:29,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:31:29,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:31:29,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:29,603 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-09-21 11:31:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,748 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-09-21 11:31:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:31:29,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-09-21 11:31:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,750 INFO L225 Difference]: With dead ends: 121 [2020-09-21 11:31:29,750 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 11:31:29,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 11:31:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-21 11:31:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 11:31:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-09-21 11:31:29,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-09-21 11:31:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,759 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-09-21 11:31:29,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:31:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-09-21 11:31:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:31:29,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,760 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:31:29,761 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,761 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-09-21 11:31:29,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513292993] [2020-09-21 11:31:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,806 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,806 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,806 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,806 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:31:29,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:31:29,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:31:29,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:31:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,932 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,932 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,932 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,932 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:29,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513292993] [2020-09-21 11:31:29,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:31:29,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009887969] [2020-09-21 11:31:29,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:31:29,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:31:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:29,940 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-09-21 11:31:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,129 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-09-21 11:31:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:31:30,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 11:31:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,131 INFO L225 Difference]: With dead ends: 132 [2020-09-21 11:31:30,131 INFO L226 Difference]: Without dead ends: 87 [2020-09-21 11:31:30,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-21 11:31:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-21 11:31:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 11:31:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-09-21 11:31:30,139 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-09-21 11:31:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,140 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-09-21 11:31:30,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:31:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-09-21 11:31:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:31:30,141 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,141 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:31:30,142 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-09-21 11:31:30,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141075887] [2020-09-21 11:31:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,191 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,191 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,191 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,191 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:31:30,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:31:30,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:31:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:30,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:31:30,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,344 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,344 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,344 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:30,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141075887] [2020-09-21 11:31:30,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:31:30,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362592964] [2020-09-21 11:31:30,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:31:30,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:31:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:30,351 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-09-21 11:31:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,542 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-09-21 11:31:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:31:30,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-09-21 11:31:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,544 INFO L225 Difference]: With dead ends: 143 [2020-09-21 11:31:30,544 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:31:30,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:31:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-09-21 11:31:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 11:31:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-09-21 11:31:30,553 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-09-21 11:31:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,553 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-09-21 11:31:30,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:31:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-09-21 11:31:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:31:30,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,555 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:31:30,555 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-09-21 11:31:30,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020658986] [2020-09-21 11:31:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,609 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,609 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,609 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,609 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:31:30,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:31:30,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:31:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:30,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:31:30,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,798 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,798 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,798 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,798 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 11:31:30,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020658986] [2020-09-21 11:31:30,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:31:30,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522352925] [2020-09-21 11:31:30,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:31:30,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:31:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:30,806 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-09-21 11:31:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,056 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-09-21 11:31:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:31:31,057 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-09-21 11:31:31,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,058 INFO L225 Difference]: With dead ends: 154 [2020-09-21 11:31:31,058 INFO L226 Difference]: Without dead ends: 101 [2020-09-21 11:31:31,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-21 11:31:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-09-21 11:31:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 11:31:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-09-21 11:31:31,065 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-09-21 11:31:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,066 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-09-21 11:31:31,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:31:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-09-21 11:31:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:31:31,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:31,067 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:31,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:31:31,068 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:31,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-09-21 11:31:31,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:31,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574224292] [2020-09-21 11:31:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,094 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,095 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,095 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,095 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:31,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-09-21 11:31:31,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:31:31,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,153 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,154 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,154 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,154 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:31,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:31,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:31,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-09-21 11:31:31,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574224292] [2020-09-21 11:31:31,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:31,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:31,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596102067] [2020-09-21 11:31:31,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:31,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:31,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:31,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:31,163 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-09-21 11:31:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,253 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-09-21 11:31:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:31,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 11:31:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,254 INFO L225 Difference]: With dead ends: 93 [2020-09-21 11:31:31,254 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 11:31:31,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 11:31:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-09-21 11:31:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-21 11:31:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-09-21 11:31:31,261 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-09-21 11:31:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,261 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-09-21 11:31:31,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-09-21 11:31:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:31:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:31,262 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:31,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:31:31,263 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-09-21 11:31:31,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:31,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517584836] [2020-09-21 11:31:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,289 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,290 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,290 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,290 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:31:31,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:31,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:31,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-09-21 11:31:31,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:31:31,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,342 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,342 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,342 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,343 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:31,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:31,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:31,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:31,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-09-21 11:31:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517584836] [2020-09-21 11:31:31,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:31,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:31:31,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734983700] [2020-09-21 11:31:31,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:31,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:31,351 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-09-21 11:31:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,425 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-09-21 11:31:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:31,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-09-21 11:31:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,426 INFO L225 Difference]: With dead ends: 88 [2020-09-21 11:31:31,426 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:31:31,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:31:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:31:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:31:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:31:31,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-09-21 11:31:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,428 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:31:31,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:31:31,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:31:31,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:31:31,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:31:31,539 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:31,540 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:31:31,540 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:31,540 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:31:31,540 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:31:31,541 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:31:31,541 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:31:31,541 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-09-21 11:31:31,541 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-09-21 11:31:31,541 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-09-21 11:31:31,541 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-09-21 11:31:31,541 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-09-21 11:31:31,543 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-09-21 11:31:31,543 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-09-21 11:31:31,544 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-09-21 11:31:31,544 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-09-21 11:31:31,545 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 11:31:31,545 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-21 11:31:31,545 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-09-21 11:31:31,545 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 11:31:31,545 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:31:31,546 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 11:31:31,546 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 11:31:31,546 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 11:31:31,546 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 11:31:31,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:31 BoogieIcfgContainer [2020-09-21 11:31:31,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:31,594 INFO L168 Benchmark]: Toolchain (without parser) took 6067.86 ms. Allocated memory was 138.9 MB in the beginning and 283.6 MB in the end (delta: 144.7 MB). Free memory was 101.3 MB in the beginning and 163.4 MB in the end (delta: -62.1 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,594 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:31:31,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.89 ms. Allocated memory is still 138.9 MB. Free memory was 100.7 MB in the beginning and 90.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,596 INFO L168 Benchmark]: Boogie Preprocessor took 114.67 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,597 INFO L168 Benchmark]: RCFGBuilder took 345.99 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 165.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,597 INFO L168 Benchmark]: TraceAbstraction took 5240.55 ms. Allocated memory was 201.3 MB in the beginning and 283.6 MB in the end (delta: 82.3 MB). Free memory was 164.4 MB in the beginning and 163.4 MB in the end (delta: 914.1 kB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,601 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 138.9 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.89 ms. Allocated memory is still 138.9 MB. Free memory was 100.7 MB in the beginning and 90.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.67 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 90.9 MB in the beginning and 179.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.99 ms. Allocated memory is still 201.3 MB. Free memory was 179.7 MB in the beginning and 165.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5240.55 ms. Allocated memory was 201.3 MB in the beginning and 283.6 MB in the end (delta: 82.3 MB). Free memory was 164.4 MB in the beginning and 163.4 MB in the end (delta: 914.1 kB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.0s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 61 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...